Quick and Easy A/C System ChargeExtreme Performance Formula for High Mileage VehiclesLeak Sealer Helps Stop Air Conditioning Leaks on Rubber Hoses, Gaskets, Seals and ALL Types of O-Rings Including HNBR, Nitrile and NeopreneAdd to Your Automotive A/C System with a Standard R134a Can Tap – Supercool Part No. 401Combined Formula adds a Blend of 11-oz. R134a Refrigerant, 3-oz. of Lubricant, a Leak Sealer and U/V Dye Charge