A two ounce universal dye injector that can be used on R12 and R134a systems! You don't need to push it with a refrigerant charge.
To inject dye or oil, simply connect the injector to the low side of the system and twist the handle.

Easy to read scale shows graduations for both standard and concentrated dyes. Injector comes complete with low side R134a coupler and drip free control valve for 1/4" R12 ports.