Antifatigue Mat, Color Black, Width 3 ft., Length 5 ft., Thickness 1/2", Mat Surface Pattern Diamond Plate, Material Closed Cell Vinyl Foam, Backing Material Closed Cell Nitrile Foam, Edges BeveledWARNING: California ResidentsThis product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.