14644 IL DOT Fluted Rib - 1.5" Deep, 7.203" on Center 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: 7.203"Peak: 1.828"Valley: 1.625"Draft: 1.875" Part Size: 36"W. x 96"L. Click here for cut-sheet