For perfect effects, DO NOT pull a vacuum on A/C gadget. For those who plan to tug a vacuum or are charging a bigger gadget or twin air gadget corresponding to on a van, suburban, or SUV, use Enviro-Secure Business 134a Replacement refrigerant. *Be aware: all merchandise on this kit aren’t regularly used at one time to rate a single car. Enviro-Secure 134a Replacement with Dye will also be usesd in all R134a programs, together with pre-1994 cars that experience complied with the USEPA Snap Legislation. Bring your A/C efficiency again to the unique chilly air! Flammable to an open flame or spark, continue with caution if utilized in techniques designed for non-flammable refrigerants.