Features: The quick coupler is made of brass metal material, which is strong and durable, with high strength, rust resistant, not easy to break, and can be used-for a long-time. The quick coupler has an auto-off function, making it easier to remove and install. The-ball lock-design combined with the rubber seal provides excellent sealing performance. This low and high-side quick coupler is suitable for car air conditioner AC-charging, R1234yf refrigerant, AC-manifold pressure-gauge, diagnostic check, recovery, and evacuation-work. It is made of good quality aluminum-alloy, durable to use. Connector features with stable performance and easy operation. Specifications: Material:Alloy+Copper Size:Approx.2x7cm/0.79x2.76inch Takeover-Caliber: QC14L AD50 QC15L AD50 QC14H L AD51 52 QC14 AD51 Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 2x Quick Coupler