RS Pro One Touch Fittings - Metric System. Features and Benefits. One-touch push to connect configuration allows for an instant tubing connection All models are useful for piping in confined spaces due to its six-angle wrench Immediate strong engineering plastic (POM) sleeve disconnection by pressing the sleeve and then simply removing tube from fitting Fittings are equipped with Teflon treatment or O-Ring on the thread Nickel plated brass body ensures anti-contamination properties for an extended life. Specification. Applicable for use with air Working pressure range, 0-150 psi Negative pressure, -29.5 in Hg Working temperature range, 32°F to 140°F. Product Application Information. Can be used in pneumatic piping and in a wide range of applications.