Features: The quick connector is made of brass metal material, which is strong and durable, high-strength, rust-resistant, not easy to break and can be used for a long time. The quick connector has auto-off function, which makes it easy to dismantle and install. Ball lock design combined with rubber gasket ensures excellent sealing performance. This low and high side quick connector is suitable for charging AC car air conditioner, R1234yf refrigerant, AC manifold pressure gauge, diagnostic inspection, recovery and evacuation work. It is made of good high alloy quality aluminum, 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 placing order.. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you for your understanding.