Universal: Size 3 spring door closer universal fit for 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
Quality Warranty: Over 500,000 times open and close testing, at least 96 hours salt spray corrosion test, 100% inspection.