Brute-strength pebble-embossed UV-resistant molded white rubber pro-style base2x stronger than traditional bases over 1300 lbs tensile strength and 900 lb tear strength Heavy-duty EVA foam padRust-resistant power-coated welded steel anchor system and stancion panReinforced sidewalls are built for extreme useB001PW2 - 18" x 18" x 2.5" 3-bases WhiteB001PW1 - 15" x 15" x 3" 3-bases White