The 32" leak-proof base is constructed of sturdy heavy-duty copolymer plastic. The durable high-gloss thermoplastic panels are further strengthened by aluminum front channels. Complete with shower valve, curtain, and assembly. Size of stall (including base) is 32-5/8" x 32-5/8" x 78-3/8". Extended base is for installations away from subfloor DWV drain. Surface is raised 2-1/2" to enclose PVC drain assembly (included) for 1-1/2" connecting pipe which can be directed through any of 4 knockout side openings. Drain opening is centered. Unit is shipped (K.D. - knocked down).