About This Cal king size box spring with metal slats compatible with any memory foam or hybrid mattress. Noise free construction design cal king metal box spring provide you a comfortable sleep time. Easy to assemble metal california king box springs, include hardware, tool and clear instructions. Come with fabric box spring cover that can be removed for spot cleaning. Heavy-duty and stable metal box springs can support up to 3000 LBS. Box spring california king size dimensions: 83.6" L x 71.6"W x 4" H for mattress size: 84"L x 72" W. Overview Size : California King Product Dimensions : 83.6"L x 71.6"W x 4"H Special Feature : Fade Resistant, Squeak Resistant Color : 4 Inch Finish Type : Polished Material Metal : Style 4 Inch : Material Metal : Style 4 Inch Maximum Weight Recommendation 2000 Pounds : Furniture Finish Metallic : Maximum Weight Recommendation 2000 Pounds : Furniture Finish Metallic