LASCO 19-9685 Barb Fitting Adapter with 3/4-Inch Insert and 1-Inch Male Pipe Thread, Nylon Nylon barb fitting 3/4-inch insert x 1-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