Specifications of HVAC Oil Injector KitMaterial: Metal, Copper, ABS, RubberHose Length: 19cm / 7.48"Coupler thread size: M11 x 1.25Package Include: 1 x 30ml (1 oz) Oil Injector, 1 x Fluid Pipe, 1 x Straight Column Quick CouplingFlexible Hose Working Pressure (Max): 355-425Psi (24-29Bar)Flexible Hose Working Pressure: Within 285Psi (20Bar)Application of AC Manual Dye InjectorSuitable for air conditioning, HVAC, home office AC, service industry, automotive industry, car auto A/C adapter, compressor sickness caused by low oil, etc.Function of Hand Push Oil & Dye Injector30ml Push-in type filter, one shot may help and rescue a bad compressor which caused by low oil, no need to rely on other system.