Top, sides, and front are 20-gauge stainless steel; back and bottom are 24-gauge stainless steel. Top has 6.5" x 15.75" (16.5cm x 40cm) stamped opening, with a one-piece lift-off cover of 20-gauge stainless steel. Ice bin is 22-gauge stainless steel, has coved corners and is pitched to 1" (2.54cm)-diameter drain opening. Insulated all around - top, sides, front, back, and bottom - with high-density closed-cell polyurethane. Bin holds 75 pounds of flaked ice. Unit can be attached to front of counter with brackets (not included) installed on top or side of ice chest.