BST-1 Micro Quick Coupler for PCP/Paintball 1/8" Female - for high-pressure application rated at 500bar. Fills paintball guns and fits the Airforce (New and older models), Discovery, Benjamin Marauder pistol and rifle, Predator & Jackal for filling purposes. Has to be attached to the high-pressure hose and DIN valve using the 1/8" x 1/8" adaptor.