Zinus 9 Inch Metal Smart Box Spring Queen
- Size: Queen
- Compatible With Mattress Size: Queen
- Maximum Weight Recommendation: 700 pounds
- Form Factor: Rectangular
Last refreshed Sep 9, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A straightforward steel queen box spring for anyone who needs a foundation under a mattress on a compatible bed frame, and a reasonable match for other mattresses once dimensions are checked.
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ASIN: B09XM7TMX6Category: Box Springs
Sizes Available
Styles Available
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Overview
A 9 inch metal box spring foundation from Zinus in queen size, built around a steel interior frame with a poly jacquard fabric cover and tool-free locking brackets for assembly.
This is a foundation meant to sit under a mattress on an existing bed frame, not a standalone bed, and Zinus notes weight capacity differs by size: 350 lbs for Twin and Twin XL, 700 lbs for larger sizes including this queen. It's built to pair with Zinus mattresses and bed frames, with other brands needing a dimension check first.
- 9 inch queen box spring
- Steel interior frame, poly jacquard cover
- Tool-free locking bracket assembly
- 700 lb weight capacity (queen)
Who it's for
Right for someone replacing or adding a foundation under a queen mattress on a bed frame they already own, especially if it's a Zinus frame or mattress. Not a fit for platform beds or frames that already include their own support surface.
Pros and cons
- Tool-free locking bracket assembly
- 700 lb weight capacity in queen size
- 5-year limited warranty on the box spring
- Requires a separate bed frame, sold separately
- Confirm dimensions before pairing with non-Zinus items
Performance notes
The steel frame inside carries the weight rating up to 700 lbs for queen and other non-Twin sizes, and the tool-free locking brackets are meant to let the pieces click together without a full bolt assembly. A bed frame is still required underneath it, since the box spring is a foundation rather than a freestanding base.
Specifications
| Brand | Zinus |
|---|---|
| Dimensions & fit | |
| Size | Queen |
| Compatible With Mattress Size | Queen |
| Maximum Weight Recommendation | 700 pounds |
| Item Weight | 38.8 pounds |
| Item Depth | 59.5 inches |
| Item Dimensions | 78.7 × 59.5 × 9 inches |
| Item Dimensions L x W x H | 78.7 × 59.5 × 9 inches |
| Construction & materials | |
| Material Type | Alloy Steel, Fabric |
| Color | Grey |
| Finish Types | Unfinished |
| Furniture Finish | Gray |
| Included components | |
| Number of Packs | 1 |
| Unit Count | 1 |
| Included Components | Steel Frame, Cover |
| Warranty & support | |
| Manufacturer Warranty Description | 5 years |
| Other details | |
| Form Factor | Rectangular |
| Shape | Rectangular |
| Number of Items | 1 |
| Style Name | New/upgraded With Quick Assembly |
| Item Type Name | Box Spring |
| Set Name | Queen |
| Product Care Instructions | Wipe with Damp Cloth |
| Assembly Instructions Description | Included |
| Item Highlight | Mattress Foundation with Fabric Outer Cover, Strong Metal Frame, Easy Assembly |
| Other Special Features Of The Product | Quick Assembly, Tool-Free Locking Brackets |
Closest rivals on specs
QEROMY 9 Inch High Profile Box Spring Queen- Item Weight 38.8 vs 10 pounds (+288%)
- Maximum Weight Recommendation 700 vs 3000 pounds (-77%)
EMODA 5 Inch Metal Box Spring with Cover Queen- Item Weight 38.8 vs 33 pounds (+18%)
- Item Depth 59.5 vs 5 inches (+1090%)
- Maximum Weight Recommendation 700 vs 1999.99 pounds (-65%)
DORITRON 9 Inch Heavy Duty Box Spring Queen- Item Weight 38.8 vs 29.4 pounds (+32%)
- Item Depth 59.5 vs 9 inches (+561%)
Frequently asked questions
Does the Zinus 9 inch queen box spring include a bed frame?
No, a bed frame is required separately to support the foundation.
What's the weight capacity of the Zinus queen box spring?
Zinus rates queen and other non-Twin sizes at 700 lbs, while Twin and Twin XL are rated to 350 lbs.
Will this Zinus box spring fit a non-Zinus mattress or frame?
It's built to pair with Zinus products; Zinus asks buyers to confirm dimensions first when using it with other brands.