... AISI1045, AISI5145 2) Be used in door closers Window part|Forging part Door Closer Piston|accessoryFeatures:1) Materials: AISI1045, AISI51452) Be ... used in door closers3) Pulling gearOur door closer are well received by DORMA Door Controls Co.Ltd. and ... alloy die-casting <280T-1350T>, three accurate casting, three auto trailers hitch ball production flowing. High stating point, high ...