Use with LF318 connector to start a drip lateral from a 3/4" or 1" drip tubing. To insert it into a 3/4" or 1" drip tubing, punch a hole into the drip tubing using the A036 black punch with the 8 mm pin and insert the small barb into the tubing. insert the other side side of the barb into our .700 OD or 17 mm drip tubing or drip line.