Flange is 22 gauge stainless steel with exposed surfaces in architectural satin finish. One-piece seamless construction, 1" W with 1/4" return. Push flat door is fabricated of 22 gauge stainless steel with exposed surfaces in architectural satin finish. Heavy-duty stainless steel piano hinge. Self-closing flap door. Waste container is fabricated of 22 gauge stainless steel with tumbler locks keyed.