Features: 100% brand new and high quality Made of high-quality brass material, durable and practical. Sturdy structure and ergonomic structure, high-performance structure during operation Easy to install and anti-aging It can safely enter the valve system even under working pressure. Valve actuation eliminates the possibility of refrigerant loss Type: Internal thread 5/16" SAE External thread 1/4" SAE Package Includes: 2PcsxBrass Adapter Specifications: Material:Brass Internal thread :Approx.5/16" External Thread:Approx. 1/4" note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.