Tracerline Universal/Ester dyes are compatible with R-1234yf, R-134a, and other widely used refrigerants. Kit Includes: OPTI-PROô UV cordless, violet light LED leak detection light, 0.5 oz (15 ml) cartridge of EZ-Jectô Universal/Ester multi-dose A/C dye, services up to 14 vehicles, 1 oz (30 ml) bottle of dye for all circulating oil-based fluids, services 1 vehicle, 1 oz (30 ml) bottle of Standard Coolant dye, services 1 vehicle, EZ-Jectô dye injector assembly, R-134a hose/coupler & purge fitting, 2 oz (60 ml) spray bottle of GLO-AWAYô Plus fluorescent dye cleaner, & R-1234yf adapter