1.Pneumatic air coupler 2.Hydraulic quick coupler 3.brass,steel quick air coupler 4.BSP ,NPT,BSPT,UNF Air Coupler:Features:1) Female Male different thread.(NPT ,BSP,BSPT,UNF....)2) Media: Compressed air.3) Working Pressure: 1.0MPa4) Max. Pressure: 1.5MPaWe can provide all kinds of air connector(air coupler). Pneumatic hydraulic male ,female 1/4" 1/8" Quick air coupler