The 1/4" barbed cross is used to connect four ends of 1/4" micro tubing or to extend and branch off three lines of micro tubing from 1/2" or 3/4" drip tubing. It will work with any of our 1/4" microtube or any 1/4" tubing that has an ID (Inside Diameter) of .140 to .170.
Use a punch to make a hole in the larger tubing and this fitting is inserted in the hole and the microtube is pushed over the other ends of the barbs.