Features: The quick connector is made of brass metal material, which is strong and durable, with high strength, rust-proof, not easy to break and can be used for a long time. The quick connector has auto-off function, which makes it easy to disassemble and install. Ball lock design Combined with a rubber gasket, it provides excellent sealing properties. This low and high side quick connector is suitable for charging car AC air conditioner, R1234yf refrigerant, AC manifold pressure gauge, diagnostic inspection, recovery and evacuation. It is made of good quality aluminum alloy, durable to use. Connector features with stable performance and easy operation. Technical data: Material: alloy + copper Size: about 2.2 x 7 cm / 0.79 x 2.76 inch Capture caliber: QC14L AD50QC15L AD50QC14H L AD51 52QC14 AD51 Package include: 2x quick connector Note: . Please allow 1-2cm errors due to manual measurement, make sure you don't mind before you place the order.. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you for your understanding.