Fiberglass. Slip resistant floor. Molded soap ledges. Above the floor rough. With E-Z Pin System. Available with left, right, or center drain. Complies with NAHB, HUD UM-73A, & ANSI-Z124.1.2. 33.0 gallon capacity. 6 year warranty. (CTR drain 75"H, 35 gallon capacity) (LH or RH drain 75-1/4"H, 33 gallon capacity).