Mustee 3648M Durabase Fiberglass Single Threshold Shower Floor, 36 x 48-Inch, White Sturdy, 1-piece molded fiberglass construction; ribbed underbody for extra strength, slip resistant Starburst surface Integral molded drain with seal for connection to 2-in Sch. #40 ABS, PVC or iron DWV sanitary drain pipe Semi-gloss surface; resistant to mold and mildew, easy to clean Designed to be used with Mustee's DURAWALL shower walls, ceramic tile or preformed wall kit