ARC K21045-ARC566 59-Inch  x 47.25-Inch  Tuff Form Shower Base with Premium Kit and Stainless Steel Grate Kit includes Tuff Form shower base and Premium Kit, which includes everything needed for installation Premium kit includes 22lb. waterproofing, drain assembly, stainless steel grate, joint tape, 4 internal corners, drain and inlet gaskets Includes acrylic caulk, 2-inch screws (20) and torx bit, paint roller and 2 covers, 2 pairs of protective gloves, paint brush, stir stick, scissors Structural glass reinforced plastic shower base spans 16 inches on-center joists Supports up to 1,100 pounds (substructure must meet load standards) and supports tremendous point loads