1.Select the high quality steel for transmission parts.The service life of ltaly oil seal is over half a million times. 2.General designed is suitable for opening doors with left/right hand and single/double opening. 3.Filled with high quality anti-icing hydraulic oil,ensuring that closing speed won't be affected at minus 20 degrees. 4.Can adjust 5mm all around in the metal box,and adjust ± 2 ° in longitudinal direction during zero calibration,making installation easier. 5.Applicable in all public glass & wooden doors Key Specifications/Special Features: Aluminum body,adjustable capacity, door weighting up to maximum 150 kgs Fully hydraulic control with maximum opening angle 175° Two completely independent adjustable valves to control swing speed from 90° to 20°, latching speed from 20° to 0° which make the adjustment become precise and easy Unique design for adjustable valves prevent the valves can not be driven out from closer to avoid the possibility of leakage 3 years warranty and tested 500,000 cycles Technical Parameters: NO. ITEM VALUE 1 Rang of Temperature -40 ° C~40 ° C 2 location deviation of closing door ±0.3 ° 3 maximum closing time >=46S 4 minimum closing time =500,000 cycle 11 guarantee 3 years