Dixon 300DC-LAL Aluminum Cam and Groove Hose Fitting, Lockable Dust Cap, 3" Straight body with one opening to terminate a hose or pipe that has a cam and groove fitting Dust cap with a female cam coupler for keeping out contaminants Aluminum for resisting corrosion and tarnishing Cam lock levers for locking the fitting's male groove adapter into female cam couplers Nitrile butadiene rubber seal rated for petroleum service, ethanol to E100, and biodiesel to B20