1.One-touch tube fittings are used in pneumatic piping2.The tube fittings come in a wide variety of models to meet all your needs in pneumatic piping3.Even after installation, the direction of the tube can be changed freely 4.Nickel-plated metal body ensures anti-corrosion and anti-contamination5.All R and NPT threads are pre-coated sealant6.The Teflon coating may duplicate uses three times, there is no releases in thread.