Colder PLCD17004 Acetal Tube Fitting, Coupler, Shutoff, In-Line, 1/4" Flow Coupler x 1/4" Barb Coupler for connecting pipes or tubing in a straight run Coupler on one end and barbed construction on the other end for connecting two pipes or tubes with different ends Acetal copolymer plastic for low moisture absorption and high tensile and flexural strength Working pressure of up to 120 psi Operating temperatures range from -40 to 180 degrees F