Colder LCD17005 Chrome Plated Brass Tube Fitting, Coupler, Shutoff, In-Line, 1/4" Flow Coupler x 5/16" Barb Coupler for connecting pipes or tubing in a straight run Coupler on one end and barbed construction on the other end for connecting tubes with different ends Chrome-plated brass for durability and corrosion resistance Working pressure of up to 250 psi Operating temperature range from -40 to 180 degrees F