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Foundations, also commonly called box springs, are the most common way to support your mattress.
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Corsicana Hotel Grey Twin Extra-Long Size Foundation
Twin Extra Long Size Basic Foundation / Box Spring Available only in 7" Mid-Profile
Northwest Bedding Twin Extra Long Size Black Foundation
A standard foundation for products by Northwest Bedding but also sold individually. Available in the Standard 9" size, and the Low Profile 5" size.
Corsicana Richland Home Twin Extra Long Size Foundation
Twin Extra Long Size Foundation
Sale!$160 Select options
HD Super Duty Double Slat Twin Extra Long Size Foundation
This is our most heavy duty (literally heirloom quality) foundation.