1. Precision : The car Air Conditioner oil dye injector is equipped with a 1/4 inch SAE female fitting, offering a secure direct connection to 1/4 inch SAE male system ports (preferably the low side), making it ideal for precise of air conditioner oil and dye into both home and automotive air conditioning systems. 2. Versatile Filling Tool: This coolant filling tube tool is designed for professional-grade applications, compatible with both home office AC and automotive AC systems, featuring a 1/4 inch female fitting that ensures compatibility with most air conditioner service systems. 3. Easy Manual Operation: The manual oiler mechanism provides a simple and controlled way to inject oil into your auto compressor. This R134A 1-ounce hand-held pump makes it effortless to operate and accurately infuse oil into automotive air conditioner adapters without the need for complex machinery. 4. Universal Compatibility: The auto compressor oil dye injector is designed to work seamlessly with all types of oils (POE or mineral), refrigerants, and is particularly effective when used with fluorescent dyes for leak detection, offering comprehensive application across various air conditioning maintenance tasks. 5. Construction: Crafted from sturdy materials including steel, brass, and rubber, the air conditioning auto oiler tool boasts a 30ml (1 oz) capacity, with a 1/4 SAE interface specification, making it a and essential service tool for injecting fluorescent agents and refrigerant oils under pressure in a wide range of cooling equipment like automotive and residential air conditioners. Filler Capacity: 30 ml (1 oz) Working pressure: within 30 kg Connector: 1/4 inch SAE Scope of application: fluorescent agent/refrigerating be filled under air conditioner pressure Use: Air Conditioning / HVAC / Professional Color: As Shown Material: Metal+Plastic Package Contents: 1 x Air Conditioner Oil Dye Injector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.