Sterling 36" x 75-3/4" Ensemble white simulated tile shower end walls are made of Sterling's exclusive Vikrell material with high-gloss finish. Vikrell is a sheet molded compound that is solid color throughout, and stronger than fiberglass. The Sterling simulated tile end walls are for use exclusively with the Sterling Ensemble bases and end walls. For 36" W showers use back wall Model No. 72102100-0 (SKU 443363) and base Model No. 72101100-0 (SKU 402932), for 48" W showers use back wall Model No. 72122100-0 (SKU 443372) and base Model No. 72121100-0 (SKU 402969), for 60" W showers use back wall 72132100-0 (SKU 443407) and base model No. 72131100-0(SKU 443390). When used with our wall sets the finished shower unit height is 75-3/4" tall. Sterling Vikrell shower systems assemble with a tongue and groove system that minimizes the need for caulk. Sterling Vikrell fixtures are backed by a 10 year consumer warranty.