DIMENSIONS: 60-in L x 32-in W with a 3-inch threshold MATERIAL: Transtone is a sheet molded compound material constructed of many solid layers of a glass reinforced polymer resin creating a beautiful slate finish with 4 times the impact resistance of other bases and 2.5 times the temperature resistance. INTEGRAL TILING FLANGE: A substantial 1 in. tiling flange ensures no water will sneak in the cracks between your shower base and walls STRENGTH AND DURABILITY: The back side of the base employs structural ribbing to easily achieve a perfectly level base while maintaining superb strength WARRANTY: limited 10-year residential warranty