High Quality: Sturdy aluminum alloy construction and premium rubber material, durable, 2oz all-metal body, long lasting. Compatibility: The HVAC injector kit is suitable for R134A, with a 1/4 connector and a 1/4 air conditioning injection tool. Smart Design: Specially designed for professional technicians who use air conditioning oil injection in air conditioning systems. This spray tool can also be used to spray UV dyes and detect leaks. Easy Installation : Apply vacuum or compress the oil with the refrigerant. Please note that it is necessary to add 56ml of oil to the R134a air conditioning system under pressure or during maintenance. Product Description ZHOUL Specifications: : R134A Injector Kit. Connection: 1/4 Male x 1/4 Female Usage: Use a syringe to add 56ml. Transfer oil into an R-134a air conditioning system under pressure or during maintenance. AC charging hose with the following specifications: Connection: 1/4" female thread. Can opener: Thread: 1/2" female thread x 1/4"