... release air couplingHydraulic quick couplerP/NMT (male thread)D (mm)QHM02-1/41/4”NPT22QHM02-3/83/8”NPT22QHM02-1/21/2” ... number: QHM09 quick couplerFeatures:1) Female Male different thread.(NPT ,BSP,BSPT,UNF....)2) Media: Compressed air.3) Working Pressure: 1.0MPa4) Max ... firmly fastened withhose clamps or ferrules. Pneumatic hydraulic male ,female Germany,USA ,ISO style Quick release air coupling