This wall mount accessibility seat for the shower is heavy-duty with a stainless steel frame. The shower seat folds up and is made of FEQ Grade-A Burmese Teak with rounded 1 3/8" wide top battens for comfort and spaced slightly to allow water drainage. Marine grade stainless steel screws and hardware are used. When properly installed, all seats are designed and manufactured to exceed all applicable federal load specifications and comply with all A.D.A requirements. Meet Federal Spec. WW-P-541/8b, Amendment 1, 16 April, 1990 and ANSI 117.1. Measures 18" long x 18.5" deep. For more information on installation and ADA compliant benches visit www.access-board.gov