Easily replaces a standard 5' bathtub with an easy-access shower or install one in new construction where a standard bathtub was planned. Provides approximately 35% more usable interior floor space than a standard bathtub. ShowerTub is sized and designed to be installed with no need for major replumbing or changing room layout. Fits in a 30" x 60" bathtub space and uses the existing 1-1/2" tub waste. Drain hole is offset 8-1/2" x 15". 4" high threshold eliminates the difficulties of stepping up and over a 15" bathtub apron. 1-piece molded fiberglass construction features a slip-resistant floor and semigloss finish that resists mold, mildew, and stains. Available as left or right hand units. Can be used with E.L. Mustee shower wall.