Plews Lubrimatic Grease Gun Grease Fitting Coupler features a standard jaw-type coupler with a spring-loaded ball check valve, designed to fit all 1/8" NPT threads. This coupler is i for use with all hand-operated lubrication equipment, though it is not suitable for power lubricating equipment. It is for working pressures up to 3000 PSI, ensuring reliable performance in demanding applications. Each package includes one coupler, conveniently presented on a card for easy handling and storage. Model Number: 05-031