Grease Coupler 3-Jaw, For Use With Hand Operated Grease Guns, Size 19/32 in OD, Connection 1/8 FNPT, Max. Pressure 10,000 psi, Min. Burst Pressure 10,000 psi, Working Pressure 6,000 psi, Features 3 Jaw Construction, Fully Hardened Spring Steel Jaws, Hardened Coupler Body withstands High Pressure without Deformation, Hexagonal Nut for Easy Tightening, Without Ball Check WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer, and Di-isodecyl phthalate (DIDP), which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. - Nickel (Metallic)