Photo 1 of AmazonBasics Mattress Foundation / Smart Box Spring for Cal King Size Bed, Tool-Free Easy Assembly - 9-Inch, Cal King

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Photo 1 of AmazonBasics Mattress Foundation / Smart Box Spring for Cal King Size Bed, Tool-Free Easy Assembly - 9-Inch, Cal KingPhoto 2 of AmazonBasics Mattress Foundation / Smart Box Spring for Cal King Size Bed, Tool-Free Easy Assembly - 9-Inch, Cal King