Johnsen's R-134a is proudly made and packaged in the USA for use in all factory installed and/or retrofitted R134a auto A/C systems. It comes with a standard ACME threaded cap for use with simple screw on charge hoses and professional technician air conditioning manifold gauge tools. This product meets or exceeds the AHRI 700-206 and SAE J 2776 purity standards required for your peace of mind to know that you're using a quality product in your vehicle. This refrigerant comes in a handy 12 oz. can thats small enough for topping off your A/C system, yet large enough to make charging an empty system quick and effective with just a few cans.