The John Guest 1/4 in. O.D. x 1/4 in. NPTF Push-to-Connect by Male Valve is manufactured from white polypropylene and equipped with EPDM O-rings utilizing John Guest's push-fit technology to make an easy, reliable, leak-free connection. Developed to satisfy a wide range of applications it can be used on plastic or soft copper tubing. To make a connection, the tube is inserted by hand and the unique John Guest collet locking system holds the tubing firmly in place. Disconnection is just as easy and requires no special tools. Features: John Guest push-to-connect technology provides a simple, reliable, leak-free connection Manufactured from white polypropylene and equipped with EPDM O-rings Can be used with plastic or soft copper tubing Lead-free, corrosion free, non-toxic and more chemically resistant than other plastics Manufactured with FDA compliant materials and NSF 61 and 51 certified Rated to 150 psi at 70°F and 60 psi at 140°F Possible applications include: reverse osmosis systems, ice makers, home/office coffee and beverage dispensing equipment, hydroponics and aquarium/aquatics