Check the listing for details. Refrigerant dye charge for R1234yf, UV dye, R-1234yf, Enviro-Safe, 2 cans, . Condition: New. Listed at 43.00 USD. AerosolEnviro-Safe Dye Charge is fully compatible with mineral, ester and pag oils.For use in 1234YF automotive applications.Highly concentrated dye (fluorescent yellow)In some cases, you can see the dye with the naked eye.The dye works best with the use of a black light and UV glasses.#3565 UV Glasses#3525 Black lightThis is the same color dye that most auto makers inject into the vehicle when new.This 4 oz can is enough dye for a full-size 1234YF auto or truck.Has 134a top on the can which means it is a right handed top and you need to make sure you have a hose that will work with it!DO NOT use in ammonia systemsDO NOT use in CO2 systemsCannot be sent to Alaska or Hawaii or exported to foreign countries except in pallet quantitiesGas propelledInstalls the same way as refrigerantCannot be added to a fully charged systemAerosolEnviro-Safe Dye Charge is fully compatible with mineral, ester and pag oils.For use in 1234YF automotive applications.Highly concentrated dye (fluorescent yellow)In some cases, you can see the dye with the naked eye.The dye works best with the use of a black light and UV glasses.#3565 UV Glasses#3525 Black lightThis is the same color dye that most auto makers inject into the vehicle when new.This 4 oz can is enough dye for a full-size 1234YF auto or truck.Has 134a top on the can which means it is a right handed top and you need to make sure you have a hose that will work with it!DO NOT use in ammonia systemsDO NOT use in CO2 systemsCannot be sent to Alaska or Hawaii or exported to foreign countries except in pallet quantitiesGas propelledInstalls the same way as refrigerantCannot be added to a fully charged system