Envirosafe Dye Charge for Automotive R1234YF Systems, Multipack Quantity, 12 Cans, R-1234yf

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. Each can is 4oz (113 grams) Universal