door closer, door hinge, door spring, door fitting, door hardware, door accessories, automatic door system stainless steel door closer, door hinge, door spring, door fitting,door hardware, door accessories, automatic door system1 The max width of door is 1200-1500mm,suitable for the door weight of 75-95kg2 The adjustable section of closing speed is 180'-20'3 The high carbon steel axis and rack ...