Grease Coupler 3-Jaw For Use With Grease Guns Size 1/2 in Connection 1/8 FNPT Max Pressure 10 000 psi Min Burst Pressure 10 000 psi Working Pressure 10 000 psi Material Steel Features Steel Jaws and Heat Treated Coupler Body to Withstand High Pressure Without Deformation Includes Ball Check Package Quantity 3