Standard hydraulic coupler to suit most greasing application, fitted with a spring loaded ball check mechanism to prevent pressure loss and four fully hardened spring steel jaws for a long service life. This product is for use with hand operated grease guns only with a working pressure of up to 6,000psi / 413 bar.Fits Faithfull grease guns FAI GGHD and FAI GGMP and flexible hoses FAI GGHOSE12 and FAI GGHOSE18.Suitable for use hand operated grease guns with a 1/8in BSPT thread and working pressure not exceeding 6,000psi / 413 bar.