【Easy to Use】Pneumatic quick connectors are easy to install and disconnect, no tools needed to connect or disconnect the hose. 【Copper Steel】Steel body with copper core, not easy to leak, good anti-rust performance. 【Nickel Plating】The surface is nickel-plated for wear resistance and oxidation resistance, which can extend the service life. 【Precision Threading】The connector adopts high precision threading to ensure tight fixing and good sealing performance. 【Wide Applications】Widely suitable for connection between pneumatic devices and air lines. Size: 4 way Features: 1. Easy to install, no tools required when connecting or disconnecting the hose. 2. Steel body with copper core, not easy to leak, strong and durable, long service life. 3. The surface is nickel-plated, wear-resistant and anti-oxidation. 4. High precision threads ensure a tight fit. 5. Widely applicable to the connection between pneumatic devices and air lines. Specifications: Material: Steel + Copper Thread: PT 1/4 Height: 58mm/2.28inch Aperture: 12 mm / 0.47 inch Set includes: 1 x pneumatic quick connect Note: Please allow slight errors due to manual measurement. Thank you for your understanding.