SB4181, Kerdi-Shower-SB, Schluter Shower Bench, Rectangular-32"W x 16"D x 20"H Kerdi-Shower-SB 16 in. x 32 in. Bench Model SB4181 Kerdi-Shower-SB is a lightweight, expanded polystyrene shower bench The bench is designed to integrate with the Schluter-Shower-System It is stable, load bearing and features a sloped surface Installation of the bench is quick and easy