Sterling 39" x 79-1/8" Intrigue white shower wall sets 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. These wall sets must be used exclusively with the Sterling Intrigue shower base model No. 72014400-0 (SKU 402754). When used with our base the finished shower unit is 39" x 39" x 79-1/8" T. Sterling Vikrell shower systems assemble with a tongue and groove system that minimizes the need for caulk. Use Sterling doors Model No. SP2276A-38S (SKU 402424), SP2277A-38PB, and SP2277A-38S. Sterling Vikrell fixtures are backed by a 10 year consumer warranty.