marie automatic adjustable size 3 spring hydraulic door closer heavy duty auto closer for residential and commercial doors

Universal: Size 3 spring door closer universal fit for 40-65 KG (88-143 lbs) commercial doors, escape doors, security doors, fire doors and so on | Material: Made of environmental aluminum alloy casting body, with built-in anti-external force device offer a protection for the door, door frame and door closer, ensuring durable in use | Adjustable: Two independent valves to control the closing speed and the latching speed, Self regulate the mechanism to meet your needs | Back Check Function: Will slow down after the door is opening to 60 degree, prevent the door lock and door product damage or wall collision caused by the door opening speed being too fast | Quality Warranty: Over 500,000 times open and close testing, at least 96 hours salt spray corrosion test, 100% inspection.

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