About the American Standard 3636.ST.222 Single Threshold Shower Base, Linen
American Standard 3636.ST.222 Single Threshold Shower Base, Linen. This single-threshold shower base is constructed of acrylic with a fiberglass reinforcement, a textured bottom pattern, an integral self-leveling design, a molded-in flood guard, a double-tiling edge with a water retention flange, and a PVC shower drain with stainless steel drain plate.