Photo 1 of Amazon Basics 9inches Bi-Fold Box Spring, Mattress Foundation, Easy to Assemble, Cal King

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Photo 1 of Amazon Basics 9inches Bi-Fold Box Spring, Mattress Foundation, Easy to Assemble, Cal King Photo 2 of Amazon Basics 9inches Bi-Fold Box Spring, Mattress Foundation, Easy to Assemble, Cal King Photo 3 of Amazon Basics 9inches Bi-Fold Box Spring, Mattress Foundation, Easy to Assemble, Cal King