View 2 of ***ONLY ONE BOX***FACTORY SEALED***Durably support your mattress with the superior design and construction of Mainstays Fold-in-Half Metal Box Spring in Twin, Black. This Heavy Duty box spring boasts heavy-gauge premium steel bars throughout to provide co

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View 1 of ***ONLY ONE BOX***FACTORY SEALED***Durably support your mattress with the superior design and construction of Mainstays Fold-in-Half Metal Box Spring in Twin, Black. This Heavy Duty box spring boasts heavy-gauge premium steel bars throughout to provide coView 2 of ***ONLY ONE BOX***FACTORY SEALED***Durably support your mattress with the superior design and construction of Mainstays Fold-in-Half Metal Box Spring in Twin, Black. This Heavy Duty box spring boasts heavy-gauge premium steel bars throughout to provide co