Seat : One-piece, solidly fused plastic laminate with matte-finish melamine surfaces. Secured to frame with stainless steel carriage bolts and acorn nuts. INSTALLATION: Secure unit to wall , with the two mounting flanges located at top and the baseplate and guide bracket below. The bottom of support bracket must be positioned between the baseplate and guide bracket before they are secured to wall or partition. Mounting height of shower seat must comply with local building codes.