Dixon 200-DD-AL Aluminum Cam and Groove Hose Fitting, Spool Coupler, 2" Socket Straight body with two openings for connecting two hoses or pipes with cam and groove fittings Female cam coupler at either end for connecting to male groove adapters 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