14385 Portland Rib - 1.5" deep random ribs, repeats on 24" centers GrayLastic™Elastomeric Urethane - Up to 100 uses.Mold-bonded to 0.75" plywood. Add 1.125" to liner thickness. Max Depth: 1.500"On Center: RandomPeak: 75" - 2.75" RandomValley: 0.5" to 2.5" RandomDraft: 0.88", 0.375" Part Size: 48"W. x 240"L. Click here for cut-sheet