Sterling Performa white 60" x 29" x 15" tubs 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. 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. Performa tubs can be installed as a tub only or with the Sterling Performa wall sets model No. 71044100-0 (SKU 449490). Rough-in size: 60-1/4" (1530 mm) X 30" (762 mm) x 16-1/4" (413 mm). Complete unit rough-in dimension includes flange. Finished size: 60" (1524 mm) x 29" (737 mm) x 15" (381 mm). When used with the Sterling Performa wall set the finished unit is 75-1/2" tall. All Sterling 59" tub enclosers stocked at Do it Best will fit the Performa 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), and 5907-59S (SKU 488968). Sterling Vikrell fixtures are backed by a 10 year consumer warranty.