Sterling Advantage white wall sets are designed to be used exclusively with Sterling Advantage tubs; left hand tub Model No. 61031110-0 (SKU 402683), right hand tub Model No. 61031120-0 (SKU 402692). They 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 then fiberglass. Wall sets feature built-in shelves, and a towel bar. The finished unit is 72" tall. These units assemble with a tongue and groove system that minimizes the need for caulk. All Sterling 59" tub enclosers stocked at Do it Best will fit the Advantage shower system. Sterling Vikrell fixtures are backed by a 10 year consumer warranty.