Modern Hydraulic Automatic Door Closer Adjustable Hydraulic Buffer Fire Door Closer Positioning Doors Controller 65kg

1. After multilayer crystal diamond processing, the chemical performance is stable. 2. Hydraulic buffer door closer, the rotating shaft rotates softly, ensuring smooth opening and closing of the door. 3. The gears and shafts at both ends adopt multilayer quenching process, and surface hardness is above HRC80. 4. Using highhardness cast aluminum and coldrolled steel materials, strong and durable, wearresistant. 5. With high strength and rigidity, good toughness, high temperature resistance and high pressure resistance. Adjustable telescopic arm, can be applied to a variety of door frames to meet your various needs.