Feature: 1. PLASTIC STEEL MATERIAL: Pneumatic quick connector is made of rigid material, aging resistant, corrosion resistant, and no rust 2. ACCURATE THREAD STRUCTURE: The structure come with high hardness, clear and wear resistant thread, not easy to crack 3. BUILT IN HIGH HARDNESS STEEL BALL: The buckle is tight and smooth, easy to operate and simple to use, very practical 4. PRESSURE RESISTANT: Maximum pressure resistance for 20kgf/cm², working pressure from 0~0.92kgf/cm², working temperature is ‑35℃~60℃ 5. SELF LOCKING FUNCTION: C type self locking pneumatic connector is light weight with fast connection speed, provide great convenience for your life Specification: Item Type: Pneumatic Quick Connector Material: Plastic steel Maximum Pressure Resistance: 20kgf/cm² Working Pressure: 0~0.92kgf/cm² Operating Temperature: -35℃~60℃ . Package List: 5 x Connector5 x Lock Note: 1. During the use of the joint, please do not pull out and intubate frequently, which will affect the service life of the joint and the tube2. When the pipe is inserted into the joint, it needs to be inserted into the bottom of the joint to avoid the possibility of air leakage3. When pulling out the tube, first confirm that there is no pressure in the tube, press the end cap of the joint to the end and pull out the tube