16995 Utah Quarried Sandstone Blocks - Large Blocks, 3.875" deep GrayLastic™Elastomeric Urethane - Up to 100 uses.Mold-bonded to 0.75" plywood. Add 1.125" to liner thickness. Max Depth: 3.875"Notes:Large Individual Blocks with 0.5" grout around perimeter Part Size: 24" W x 24" H48" W x 24" H Click here for cut-sheet