John Guest Acetal Copolymer Tube Fitting, Straight Adaptor, 1/4" Tube OD x 1/4" Flared Male (Pack of 10) Straight adapter connects pipes or fittings of different types in a straight line Push-to-connect fitting connects to pipes or tubing on one end and has a flared male connector on the other Made of acetal copolymer plastic for low moisture absorption and high tensile and flexural strength Working pressure of up to 150 psi Meets NSF/ANSI standards 14, 51, and 61 for quality assurance