Feature:1. PVC PROFILES: Quick connector is made of rigid PVC material, aging resistant, corrosion resistant, and does not rust 2. ACCURATE THREAD STRUCTURE: Quick coupling has high hardness, clear and wear resistant threads, and is not easy to crack 3. EASY TO USE: With the built in steel balls, the buckle is tight and unimpeded, easy to operate and easy to use 4. BASIC SPECIFICATIONS: The maximum pressure resistance is 20kgf/cm, the working pressure is 0~0.92kgf/cm, and the operating temperature is -35~60 5. WIDE APPLICATION: Can be widely used for machinery, electronics, vehicles, packaging, medicine and other industries Specification:Item Type: Self Locking Quick Connector Material: PVC profiles Maximum Pressure Resistance: 20kgf/cm Working Pressure: 0~0.92kgf/cm Operating Temperature: -35~60 Model Specifications(Approx.)SM+PM-20 Thread Outer Diameter 13mm / 0.51in, Thread Type R1/4 SM+PM-30 Thread Outer Diameter 16mm / 0.63in, Thread Type R3/8 SM+PM-40 Thread Outer Diameter 20mm / 0.80in, Thread Type R1/2. Package List:5 x Quick Connector Fitting 5 x Locking Head Note:1. During the use of the joint, do not frequently pull out and insert the air pipe, which will affect the service life of the joint and the air pipe 2. When the pipe is inserted into the joint, it must be inserted into the bottom of the joint to avoid the risk of air leakage 3. When pulling out the air pipe, first confirm that there is no pressure in the pipe, press the end caps of the joint to the end, and pull out the air pipe