Cal King Box Springs (set)

Our heavy duty Semi-Flex Box Spring is comprised of a unique grid assembly providing a firmer, more durable surface.

The Cal King Semi-Flex Box Spring is designed with the best components to support all types of mattresses - inner spring coil mattresses, all foam mattresses (including memory foam and latex), and all air mattresses.

This unit will provide even support and durability to your Cal King mattresses for a comfortable night's sleep.

** Attention **