Features and Benefits: * Fast, efficient air operated vacuum pump * Rugged Lexan case is both oil and scratch resistant and comes with a convenient handle * Compressed air driven, no oil or moving parts to replace * 1 cfm * 1/4" Flare and 1/2" ACME fittings Easy to use - connect back fitting to compressed air source and front fitting to center hose of a standard manifold set attached to an A/C system. 75 PSI rating.