Sterling Advantage white 60" x 30" x 15" tubs 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. Tubs are available in left or right hand drain applications, and fit in a standard 5' opening. Tubs have a 15" apron, and feature a lightly pebbled slip-resistant bottom for safer footing. Sterling provides a disposable tub liner to protect the tub during installation. Advantage tubs must be installed with the Sterling Advantage wall sets model No. 61034100-0 (SKU No. 402709). When used with the Sterling Advantage wall set the finished unit is 72" tall. All Sterling 59" tub enclosers stocked at Do it Best will fit the Advantage shower system. Doors that fit include: Model No. 5905-59S-G51 (SKU 443514), 5905-59N-G51 (SKU 452753), 5907-59PB (SKU 488933), 5906-59S (SKU 488941), 5907-59S (SKU 488968). Sterling Vikrell fixtures are backed by a 10 year consumer warranty.