1. The type and temperature of the fluid (please select the quick connector of the body material and the sealing material suitable for the type and temperature of the fluid) According to the fluid, the suitable body material and sealing material are different. For example, the quick connector is air. It is recommended to be made of steel, or brass or stainless steel if it is water. 2. The pressure of the liquid (please select a Air Quick Coupler suitable for the pressure resistance of the fluid pressure) The pressure of the fluid is
