This 12 oz (340 gram) refill-sized canister of EZ Chill works perfectly with existing EZ Chill hose/gauge assemblies to give you the coldest air from your car???s A/C system. EZ Chill contains Cool Boost formula to ensure colder air than regular refrigerants can provide, and oil to keep your A/C system working smoothly. Don???t run out of EZ Chill refrigerant when you need it most: get the refill canister and be confident of comfort, anywhere.