The main function of the pneumatic quick connection fitting is to help the pneumatic tube extend, shunt, change diameter, change the flow direction, etc. Simple push in design for connecting to the tube and provide secure connection, requires no extra sealing. Round release ring on two ends facilitates pneumatic installations in confined spaces. CAUTIONS:1.Please do not use it for purposes other than fluids;2.Please do not exceed the maximum use pressure when using;3.After the pipe is connected and installed, pull the pipe to make sure that the pipe cannot pull out the joint;4.Do not use outside the service temperature range to prevent deformation of the sealing material and easy leakage;5.Do not use it in places where metal powder or sand dust is mixed, such as adhesion of other materials may cause poor work or leakage;6.When inserting the pipe, it must be inserted into the bottom of the joint. Failure to insert the pipe into the bottom may lead to air leakage;7.Make sure that the cutting surface of the pipe is vertical, there is no scar on the outer circumference of the pipe and the pipe is not oval;