Sterling 72" high Advantage white seated shower wall sets are made of Sterling's exclusive Vikrell material with swirl gloss finish. Vikrell is a sheet molded compound that is solid color throughout, and stronger than fiberglass. Must be used with Sterling base Model No. 62031100-0 (SKU 450480). The base features a lightly pebbled slip-resistant bottom for safer footing. The finished shower unit is 48" W x 34" D x 72" tall. Sterling Vikrell shower systems assemble with a tongue and groove system that minimizes the need for caulk. Use sterling doors Model No. SP5965-465 (SKU 444273). Sterling Vikrell fixtures are backed by a 10 year consumer warranty.