Molding will be Done Under Heat and Pressure Using Matched Metal Dies; The Unit will be 1-Piece with No Seams; Shoulders will be No Less than 1 Inch Wide and 9-1/2 Inch Inside; Receptor will have Ribbed Underbody and Integral Drain Providing for a No-Caulked Connection to a 2 Inch or 3 Inch ABS Pipe 36" x 24" x 11-1/4", 12" Rough-In, White, 1-Piece, Mop Receptor