Authentic Groz Professional 4 Jaw Coupler for Grease HoseModel: HC/14/4/N (with Hex Nut), HC/12/4/N (Heavy Duty) & HC/11/4/N ( Standard Type)Thread: 1/8″ NPTBest selling coupler for professional useHardened coupler body withstands high pressure without deformationFully hardened spring steel jaws