Click to expand Tap to zoom Grommet (Packet of 3) SKU FB552B Original price $2.95 - Original price $2.95 Original price $2.95 $2.95 - $2.95 Current price $2.95 | / Quantity Add to cart ย ย 3 pack of grommets. Inserted into the top of fermenter to create an airtight seal between the fermenter lid and airlock.