Mastercool 90375 Refrigerant Oil or Dye injector 1/4 Female Flare x 1/4 Male Flare.

Product Description:

An excellent method for adding refrigerant oil or large amounts of UV leak detection dye to the A/C system. Add oil by allowing the vacuum to pull it in after the evacuation process, or use refrigerant to push it in using the recharge system. Rugged all-metal 2 oz canister. The standard models use a needle style valve attached between the manifold gauge set or charging equipment and A/C hose.