G coupler for grease gun mouthpiece, thread M10, width across flats 13 mm, 15 mm. Supplied = assembled. Finish = steel. Length = 37 mm. Width = 9 mm. Height = 18 mm. Product type = accessories. Suitable for all standard types of grease gun. Suitable for all grease nipples made to DIN specifications. Four hardened spring steel jaws. Specification - Connection: M10 - 4 jaw model - Width across flats: 13 mm - Material: steel, zinc plated - Diameter: 15 mm - Length: 37 mm Areas of use: commercial vehicles, construction machinery, tractors etc. Coupling does not have to be held during lubrication and no grease will leak The grease nipple is released by simply pressing the trigger.