Zinus 7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong
Today
Typical in 2 days$229
Amazon: the cheapest today among the stores checked
Buy on AmazonZinus 7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong or Zinus 9 Inch No Assembly Metal Box Spring?
Cost the same today, across the stores checked.
Zinus 7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong is the cheaperZinus 9 Inch No Assembly Metal Box Spring is the cheaper
The comparison in detail
Zinus 9 Inch No Assembly Metal Box Spring
Today
Typical in 2 days$229
Amazon: the cheapest today among the stores checked
Buy on AmazonAffiliate links: if you buy, the store pays us a commission at no cost to you.
Both prices over the last 30 days
7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong9 Inch No Assembly Metal Box Spring
- Hover, tap or use the arrow keys to see each day
Still only a few days of data for both to read the trend; the chart fills in as the days go by.
Where is each one cheapest today?
Updated 07/11/2026
7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong
- Amazon Lowest price$229Buy on Amazon
9 Inch No Assembly Metal Box Spring
- Amazon Lowest price$229Buy on Amazon
Spec sheet side by side
| Item | 7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong | 9 Inch No Assembly Metal Box Spring |
|---|---|---|
| Specs | ||
| Type | Spring | Spring |
| General | ||
| Model changes | 7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong | 9 Inch No Assembly Metal Box Spring |
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9 Inch No Assembly Metal Box Spring orBlazing Needles Renewal 10" Twill Futon Mattress$215Compare
7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong orZinus 10 Inch Full Ultima Memory Foam Mattress$223Compare- 9 Inch No Assembly Metal Box Spring orLucid 10 Inch Gel Memory Foam Mattress$230Compare
7 Inch Metal Smart Box Spring / 700 lbs Mattress Foundation / Strong orZinus 8 Inch Short Queen Ultima RV Memory Foam Mattress$231Compare- 9 Inch No Assembly Metal Box Spring orZinus 10 Inch Full Ultima Memory Foam Mattress$223Compare
See more 1 comparison
How we choose
Source: Catalog of partner stores, checked on 07/11/2026.
Lowest price seen for the product in the stores we read, on the day it was read, before sales tax. The model is the brand plus the name of the mattress; the versions go in the table. The price range, the median and the position use only models with a score; the price comparison looks at models whose score is within 0.5 points.
The spec score doesn’t measure how comfortable it feels or durability, and the strong or weak point reading is just a comparison of numbers, not a buying recommendation.