Dixon 250-B-AL Aluminum 356T6 Type B Cam and Groove Hose Fitting, 2-1/2" Socket x 2-1/2" NPT Male Straight body with two openings for connecting two hoses or pipes with cam and groove fittings or threads One female cam coupler end for connecting to male groove adapters and one NPT male threaded end for connecting to NPT female threaded connections (Type B) 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