Hozelock 2778 Straight Connector 4mm Micro Irrigation High quality in line connector.
Made from UV stable plastic.
For extending the 4mm supply tube, and for branching off from the 13mm supply tube.
This is achieved by punching a hole in the supply tube with the 2799 hole punch. Screw the threaded end of the connector into the 4mm tube - using the spanner on the hole punch. Finally click the connector into the supply tube.