You are looking at a brand new Large 2 oz Oil and/or Fluorescent Dye Injection Syringe/Injector/Charger, for AC/HVAC/R Services FEATURES: 2 oz capacity; Good for compressor oil or fluorescent dye; One shot may be it all takes to cure and save a sickened compressor caused by low oil; Compatible with fluorescent dyes for leak monitoring, too Compatible with all oil types(POE, or mineral oil) Compatible with all refrigerant types; Screw-in type, or push-in type, does NOT require a working compressor to get the injection power Re-loadable, re-usable, keep it in tool box for decades to come. Aluminum alloy body, with brass connector on a piece of high pressure hose 1/4" female connector, make it compatible with most AC systems(use CV23p for 5/16" R410a systems). 45 degree turn at the connection, easy to access port. 5 inch flexible high pressure hose. Hand operated(Screw-down), NOT in-line injector, do not need other power. In stock and ready to ship.