Made of fine quality material, practical, easy to install and use, wide application range, has a long service time. Features: Low-side quick coupler adapter. The 30ml (1oz) inject tool comes with a 1/4 inch female SAE connector, that goes directly to the 1/4 inch SAE male system ports (lower side preferred). If you are working on a system with different port size, you may need to have an adapter(not included). Perfect for home/office Air Conditioner and Car Air Conditioner Oil and fluorescent dyes for leak monitoring. Compatible with all oil types (POE, or mineral oil) and all refrigerant types. Simple operation may save a sickened compressor caused by low oil. Specifications: Main material: metal+plastics In and out thread size: 1/4SAE Oilcan capacity: 30ml / 1ounce Flexible hose working pressure (maximum): 355-425psi (24-29bar) Working pressure of hose: within 285psi (20bar) Inject tool length: 110mm / 4.3in Tube length: 200mm / 7.9in Package size: 200 * 70 * 30mm / 7.9 * 2.8 *