Adapter-Needle Nose, For Use With Hand Operated Grease Guns, Size 1/8 in NPT, Connection 1/8 in MNPT, Max. Pressure 7,000 psi, Min. Burst Pressure 13,000 psi, Working Pressure 7,000 psi, Material Steel/Nitrile Rubber, Features Attaches to Hydraulic Coupler of Control Valve or Grease , Lubricates U-Joints and Spindles, Includes Coupler Slip Joint, Universal Joint Adapter