The Mastercool 53322 is a Refillable Dye Injector (1/4 FL systems only). To inject the oil or dye, simply connect the injector to the low side of the A/C system and twist the handle until you reach the desired amount. The injector hose comes complete with a R134a coupler and auto shut-off valve adapter for 1/4″FL systems.
Product Features:
- 1/4″ Auto Shut-off Valve Connection
- 2 oz Bottle of Concentrated A/C Dye (25 Applications)

