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Heavy duty door closer
1.500,000 cycles passed 2. Adjustable closing & latching speed"1"=Closing speed adjusting valve, range from 180°to 15°"2"=Latching speed adjusting valve, range from 15°to 0°3. Built-in hold open (optional)Built-in hold open can hold door open at your desired angles between 85 ° to 180 ° .Available for power 1,2,34. Hold open arm (optional)Hold open arm can hold door open at any angles you desire5.Adjustable Backcheck (optional) Provides a cushioning effect when the door is forcibly thrown open but does not serve as a substitute for a doorstop. Nominal operating ranges 75 ° -80 °