20PCS Airlock Grommet for Airlock On Homebrew Bee, Mead, or Wine Fermenter Lid

Airlock grommet for airlock on homebrew beer mead wine fermenter Lid, inside hole diameter is 9 mm, out site hole diameter is 12.5 mm. Gd: 12.5 mm ID: 9 mm OD: 16.8 mm gw: 2.75 mm the: 8.4 mm.