Suggested Retail:$102. Priage by Zinus 5 Inch Smart Box Spring Foundation - Full. The Priage by Zinus Smart Box spring fits a mattress. It looks and functions like a traditional box spring, but made from steel for longer-lasting durability. Enjoy the strong support and convenience of this 5 inch thick box spring. It features compact packaging allows for tight interior spaces such as stairs and hallways. Assembly required with all the needed tools included. Furniture Room: Bedroom Material: Fabric, Steel Assembly: Assembly Required Bed Style: Regular Bed Finish: Steel Finish Color: Black frame with white cover Dimensions: Full size: 53 inches wide x 74 inches long x 5 inches high Assembly required.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. PAID DELIVERY AND 7 DAY ALTERNATE PICK-UP ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.