Storm/screen door closers pneumatic - heavy duty finish=aluminum Aluminum tube - steel rod, steel jamb and steel door brackets. Heavy duty air controlled door closer is designed for use on out swinging wood or metal doors up to 1-3/8 inch thick. Door closing speed is fully adjustable. Two hole end plug allows closing force to be regulated. Includes convenient hold-open washer. Extended operating life as closer is permanently lubricated. Visual-pack.