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SEALY® King Split Boxspring - High Profile 9"

Sealy is a pioneering mattress brand known for its science-backed support and comfort. It was voted the #1 most trusted mattress brand in Canada, reflecting over a century of quality craftsmanship.

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– - 9" Pedestal Foundation- Quilted Border- Corner Guards- Dark Fabric- Works with all King Size Sealy Mattresses

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$358.00

Retail Price $799.00

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SEALY® King Split Boxspring - High Profile 9"

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Core Type	Solid Wood with Semi-flex Metal Wire Frame
Core Density	22–31 lb/ft³

Collection	Sealy®
Model	King High Profile 9"
Warranty	10 Year Warranty
Condition	Brand new, manufacturer sealed.

Our Guarantees

+ Full Manufacturer’s Warranty

➜ Not sure which mattress is best for you? Try our MATTRESS SELECTOR to help you decide!

➜ See our REVIEWS from verified customers!

Sealy King Split Boxspring - High Profile 9" | Elevate Your Sleep with Stylish Support!

Discover the perfect blend of sophistication and comfort with the Sealy King Split Boxspring, designed to enhance your sleep environment dramatically. Standing tall at 9 inches, this elegant box spring complements any Sealy king mattress, ensuring that your restful nights are both stylish and supportive. The refined quilted border wrapped in deep-toned fabric not only enhances your décor but also promises lasting durability and unwavering support for joyful slumbers.

Key Features

Luxurious Height: The elevated 9-inch profile simplifies getting in and out of bed while maximizing mattress performance, creating an effortlessly inviting sleep experience.
Chic Quilted Finish: Featuring a stylish quilted edge, this box spring accentuates your bedroom's elegance while providing an extra layer of plush comfort that invites relaxation.
Robust Corner Guards: Equipped with specially designed corner guards, this box spring enhances durability and safeguards against everyday wear, ensuring a long-lasting investment.
Subtle Dark Fabric: Crafted with modern dark fabric, this design complements various bedroom aesthetics while maintaining a clean look that enhances your sleeping area.

Benefits

Superior Construction: Built with solid wood and a semi-flex metal wire frame, this foundation is engineered for exceptional stability, contributing to an extended mattress lifespan.
Compatible Fit: This box spring is universally designed to work seamlessly with all King Size Sealy mattresses, allowing for customized sleep setups that prioritize both comfort and functionality.

Perfect For

Ideal for anyone seeking an enhancement to their sleep quality with added style, the Sealy King Split Boxspring seamlessly fits into any living space. From modern urban apartments to classic suburban homes, this foundation meets the needs of diverse lifestyles while delivering dependable support and a touch of sophistication.

Product Details

Dimensions: 76″ x 80″ (inches) – 193cm x 203cm (centimeters)
Profile Height: 9" (inches) - 22.8cm (centimeters)
Firmness: Moderately supportive, designed to enhance your mattress comfort.
Warranty: Comprehensive manufacturer's warranty included, providing assurance with your purchase.
Guarantees: Benefit from convenient next day delivery, a price match guarantee, and a secure 100 Night comfort trial for a worry-free shopping experience!

Transform your sleep experience with the Sealy King Split Boxspring - High Profile 9". Crafted for those who value both luxurious comfort and exceptional quality, this box spring serves not just as a support base, but as a statement piece in your bedroom sanctuary. Embrace tranquil sleep night after night with the trusted craftsmanship from Sealy!

Specifications

More Information
Features	Breathable
Trending & Offers	Limited Stock
Model	King High Profile 9"
Price Range	Premium
Collection	Sealy ®
Brands	Sealy
Condition	Brand new, manufacturer sealed.
Warranty	10 Year Warranty
Cover Material	Non-Skid Top. Fabric may vary.
Colour	Black
Quilt	Non-quilted Stretch Knit Non-Slip Fabric
Core Material	Spruce/Pine/Fir (SPF) with Steel Wire
Core Type	Solid Wood with Semi-flex Metal Wire Frame
Core Density	22–31 lb/ft³
Additional Features	Corner Guards
Certifications	Sealy® foundations comes from suppliers certified by the Sustainable Forestry Initiative (SFI), Forest Stewardship Council (FSC), or Canadian Standards Association (CSA), ensuring responsible sourcing.
Vented	Yes
Removable Cover	No
Care Instruction	Spot clean only.
Country of Origin	Canada
Manufacturer Contact Information	http://www.sealycanada.com/
Dimensions	76" x 80" (inches) - 193cm x 203.2cm (centimeters) - (2 pieces 38" x 80" x 9" (inches) - 96.5cm x 203.2cm x 22.9cm (centimeters) each.)
Product Length (inches)	80 in
Product Width (inches)	76 in
Product Height (inches)	9 in
Product Weight (lb)	79.100000
Product Length (cm)	203.2 cm
Product Width (cm)	193 cm
Product Height (cm)	22.9 cm
Product Weight (kg)	35.9 kg
Product Code	*TWINXL x 2*
Product Model Code	SEALY-BOXSPRINGSPLIT-HIGH
Product SKU	SEALY-BOXSPRING-KINGSPLIT-HIGH
Product Category	Box Spring
Product Sub Category Tier	Premium
Product Type	Accessories - Boxspring
Product Sub Type	High Profile
Collections	Sealy Boxspring

More Info.

Purpose of a Boxspring

A boxspring is used to support your mattress and to add height to your bed.

Support – A boxspring will ensure that your mattress is supported properly, and its weight is distributed evenly throughout the bed. Proper support is essential to maintain the integrity and longevity of your mattress. A boxspring can be placed directly on the floor, or used with any supportive bedframe.

Height – Boxsprings also add height to your bed. Whether you like your bed to be lower to the ground, or higher up, you can find various heights of boxpsrings to make your bed just right. Standard size boxsprings are usually used with bedframes as high as 11 inches off the ground. If your bedframe is higher than 11 inches, you may want to consider a low profile boxspring to make it easier to get in and out of bed. These are just guidelines, so we do recommend measuring your existing bedframe and then deciding on the height of the boxspring you require once you have picked out your new mattress. Mattress heights can differ greatly from one model to another.

Did you know: Bedframes with supportive slats which are spaced no more than 2 inches apart, typically do not require a boxspring. However, to add additional support, you may look into a platform foundation which will not raise the overall height of your bed too much (only 2 inches in height) but will add support if you need it.

Matching boxsprings usually have the same colour fabric as your mattress, however mix-match boxsprings are a great option to save some money as they still provide the support your mattress needs, and once you put on bedsheets and a bed skirt you don’t see the colour of the mattress and boxspring anyways.

Delivery Options

Greater Toronto Area and Ontario Delivery Map

What’s Included

We offer FREE DELIVERY to all major cities in Ontario and the surrounding area on orders over $199. A delivery surcharge of $45 applies to orders under $199.

Select your delivery date at checkout (if applicable) and add any special instructions in the order comments (e.g., “Ring Buzzer #1234”). If a date isn’t shown or selected at checkout, you’ll receive an email with scheduling options. Day‑of, you’ll get a text and email with a 2‑hour window and live tracking. Estimates apply to in‑stock items; rural or weather‑affected addresses may require extra time.

Greater Toronto Area and Ontario Free Mattress Delivery Map

Ontario Local Delivery Areas

Next‑day available

Halton Region

Burlington • Oakville • Milton • Georgetown • Halton Hills

Next‑day available

Peel Region

Mississauga • Brampton • Caledon

Next‑day available

City of Toronto

York • Including Downtown Core

Next‑day available

York Region

Vaughan • King • Richmond Hill • North York • Aurora • Newmarket • Markham • Scarborough

Next‑day available

Durham Region

Pickering • Ajax • Whitby • Oshawa • Whitchurch‑Stouffville

Next‑day available

Waterloo Region

Guelph • Kitchener • Cambridge • Waterloo

Next‑day available

Hamilton

Including Dundas • Grimsby • Stoney Creek • Ancaster

1–3 days on average

Niagara

Niagara Falls • Niagara‑on‑the‑Lake • St. Catharines • Thorold • Welland

Next‑day & 1–3 days

Simcoe Region

Barrie • Innisfil • Orillia • Midland • Collingwood • Bradford • Washago and more

1–3 days on average

Northern &
Eastern Ontario

Cobourg • Peterborough • Kawartha Lakes • Minden • Haliburton • Port Perry • Bowmanville and more

1–3 days on average

Western Ontario

London • Stratford • Woodstock • Brantford • Grand Bend • Port Elgin • Tobermory and more

Need delivery outside the GTA?

We also ship to all provinces in Canada at competitive rates (territories excluded). Enter your postal code at the top of the website to see what’s available.

Ready to Sleep Better?

Shop online 24/7 or visit any National Mattress location across Ontario. Spend $199+ and relax—your new mattress will arrive quickly and free of charge locally, or ship fast across Canada.

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Frequently Asked Questions

Where does National Mattress offer free local delivery?

We offer FREE local delivery to major cities across Ontario on orders of $199+. Check the region cards above for specific cities.

Do you ship mattresses across Canada?

Yes. We ship select roll‑packed mattresses to all provinces (YT, NT, NU excluded). Transit times range from 1–2 days in ON & QC to 3–4 days in BC and NL after shipping.

Is next‑day delivery available in the GTA?

Yes. FREE next‑day local delivery is available in many GTA and surrounding areas, subject to inventory and cutoff times.

What if my Ontario local order total is under $199?

A $45 delivery surcharge applies to orders under $199.

How do I schedule or change my delivery date?

Select a date at checkout. If a chosen date isn’t available, you’ll receive an email proposing an alternative—simply reply to reschedule. In‑store purchases can be scheduled at the time of sale.

Will I get tracking updates?

Yes. Local deliveries include day‑of text/e‑mail with a 2‑hour window plus live GPS tracking. Canada‑wide shipments include a courier tracking number once picked up.

Do you deliver to Yukon, Nunavut, or the Northwest Territories?

No. We currently do not deliver to YT, NU, or NT.

Need help? 1‑800‑631‑4883 [email protected]

Product Questions (12)

Customer Questions

Can I use this for a any longer size mattress?

You should only use this for standard king-size mattresses.

Does this product require assembly

No, it comes in 2 pieces already assembled. Just place them side by side on your bedframe.

Can you change the fabric colour

We cannot change the fabric. This box spring comes with a dark fabric.

Are Sealy mattresses considered good quality?

Sealy mattresses are widely regarded as offering solid performance and value, especially in the mid-range segment. As with any brand, quality and features vary by collection and price level, so it's helpful to compare specific models, materials, and...

What firmness options do Sealy mattresses come in?

Sealy mattresses are typically available in multiple firmness options, including plush/soft, medium, and firm, and occasionally extra-firm or ultra-plush depending on the collection. This makes it easier to match a Sealy mattress to your sleep position...

What sizes do Sealy mattresses come in?

Sealy mattresses are commonly available in standard sizes such as Twin, Twin XL, Full/Double, Queen, King, and sometimes California King. Availability of specific sizes can vary by model and collection, so always confirm which sizes are offered for ...

What kind of foundation do I need for a Sealy mattress?

Sealy mattresses typically require a supportive, level foundation such as a platform bed, slatted frame with appropriate spacing, adjustable base, or compatible box spring. Using the correct foundation helps maintain proper support, reduces sagging, ...

Is this Sealy mattress compatible with an adjustable base?

Several Sealy mattresses are designed to be compatible with adjustable bases and can bend and flex as the base moves. Check the product description for notes on adjustable base compatibility; if listed as compatible, you can pair this mattress with ...

Are Sealy mattresses safe and low in emissions?

Sealy mattresses are generally designed to meet applicable safety and emissions standards for the regions where they are sold. Many models use foams that are tested for content and emissions, and Sealy publishes material and safety information for their...

How long does a Sealy mattress usually last?

With normal use and proper care, a quality Sealy mattress can last many years. Actual lifespan depends on the specific model, materials, the sleepers' weights, and how often the mattress is used; higher-end Sealy models with stronger support systems...

Is this box spring standard height or low profile?

The height of this box spring is listed in the product specifications, for example standard height around 8 to 9 inches or low profile around 4 to 5 inches. Check the measurement to see how much it will raise your mattress and whether that fits your ...

Is this box spring a one piece or split design?

This product page specifies whether the box spring is a single piece or a split construction. For queen and king sizes, look for notes such as "split queen" or "split king" if you need the base to come in two pieces for easier delivery...

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