Grommet used to attach fittings to seat tank, such as elbows and fuel valve.
Fuel safe and ethanol safe.
These push-in tight grommet fittings are installed by drilling a 15/32″ hole in the seat tank. (We have successfully used 1/2″ as well.)
Warm the grommet in hot water, install in the hole and push in a lubricated fitting.