Features and Benefits: * 14mm female connection for R134a hoses * Works on the new HFO1234yf fittings * Chrome design for years of service * Solid construction Why purchase a new Manifold for HFO1234yf when you can purchase a NEW HFO coupler to use on your R134a manifold. Convert R134a manifolds to the new refrigerant HFO1234yf with new coupler, this saves money. Chrome design manual couplers for years of service.