16985-S Indiana River Rock - Shallow - Random cobble stone, 0.75" deep GrayLastic™Elastomeric Urethane - Up to 100 uses.Mold-bonded to 0.75" plywood. Add 1.125" to liner thickness. Max Depth: 0.750Stone Size: 3" - 10" W Radius Part Size: 120"W x 48"H Click here for cut-sheet