LASCO 19-9709 90-Degree Barb Fitting with 3/8-Inch Insert and 3/8-Inch Male Pipe Thread, Nylon Nylon barb fitting 3/8-inch insert x 3/8-inch male pipe thread Use on I.D. size poly tubing Working pressure 150 psi, up to 175 degree Fahrenheit Do not use with acid based fertilizers, bromine, chlorine, fluorine, xylene or any acids