These removable access doors are sealed with a gasket affixed between the door panel and frame. (Note: Door has NOT been tested for air tightness.) Doors and frames are fabricated of 16 gauge, galvannealed steel with a full length piano type hinge. Removable panels feature rounded corners for safety. The 1” (25) frame perfectly conceals rough wall openings and is of one piece construction. 1/4” (7) Holes are predrilled in the frame interior and allow fastening to wall framing for quicker installation. Four screwdriver operated latches secure the door to the frame.