Suggested Retail:$79. Mainstays 7" Easy Assembly Smart Box Spring, Twin XL. Set yourself up for a great night's sleep with the Mainstays 7" White Jacquard Smart Box Spring. Offers the look and functionality of a traditional box spring but made from steel providing ultra-sturdy support for any innerspring, memory foam or combination mattress, features a 100% polyester jacquard covering that prevents shifting. This innovative box spring is designed to easily fold up for convenient storage and transport when not in use. The Mainstays 7" White Jacquard Smart Box Spring sets up in seconds with no tools required and is available in Twin, Twin XL, Full, Queen, King, and California King sizes to create the perfect sleeping platform in any bedroom. Twin XL shipping dimensions: 41.34" x 11.61" x 8.7" - 30.25 lbs.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.