Top hat grommets for use as replacement parts for many hydro systems and hydro set-up's.
These grommets are very handy for connecting pipes to tanks and buckets etc. Used in many hydroponic systems sold today.
Top hat grommets give a water tight connection into tanks or planters using 13mm supply tubing.
Once you insert the grommet into the hole, you push the pipe through the grommet, so that you can see it sticking out of the tank.
Need more pipe/hose?