The Serta Flat Mattress Foundation is a box spring alternative and provides the perfect support for your Serta mattress and is designed to provide durability and long-lasting comfort. Pairing this bed base with your mattress will support it and extend its life while helping isolate the effect of your partner’s movements in bed. Included: 1 Box Spring(s) Additional Information: Suitable for Adjustable Bed Frames, Eliminates Motion Transfer, Relieves Pressure Points, Conforms To Body Manufacturer Warranty: 10 Year Bed Size: Twin Measurements: 6 Height/Inches, 38 Width/Inches, 74.5 Length/Inches Base Material: 100% Polyester Care: Spot Clean Certifications And Listings: Cpsc - 16 Cfr 1632 Compliant, Cpsc - 16 Cfr 1633 Compliant Country of Origin: Made in US