door for duct access with no hinge has an insulated door panel, along with the gasketing betwwen the door and frame assures a tight seal without obstruction in the air system. Unit comes with extra – self tightening, hand operated cam latch(es) making the door panel completely removable. Galvanized steel material with mill finish. 4 latches. Silver finish. 24″w x 24″h outside flange dimensions. 22-3/4″w x 5/8″d x 22-3/4″h return flange dimensions.