Hog Heaven Solid Modular Tiles are flow-through tiles with excellent anti-fatigue properties designed for wet areas where grease, oil, and chemicals may be present. Comfortable - High-density, closed-cell nitrile rubber provides excellent anti-fatigue qualities to help reduce the pain and fatigue associated with standing for long periods of time Safe - Drainage holes allow liquid to flow through; beveled edges provide a safe transition from floor to mat and will not crack or curl Durable - Nitrile rubber provides years of useful life and can withstand the rigors of almost any industrial environment Versatile - Welding safe; grease/oil proof; chemical resistant; ESD rating of electrically conductive Tiles are 3/4" thick and available with black or OSHA-approved yellow borders Center (18" x 18") Corner (21.875" x 21.875") Side (18" x 21.875")