Mudder 50 Packs Airlock Grommet, Fermenter Lid Grommet, Rubber for Mason Jars, Straws, Airlock, Beer, Wine, Plastic Bucket Fermenter Lids, 5/8 Outer Diameter and 3/8 Inner Diameter

La mejor opcion para usar cualquier contenedor con trampa de aire, solo se requiere una mecha de 1/2 pulgada y listo, funciona correctamente en cunetes de plastico, frascos de vidrio, hasta en botellones de plastico con tapa

Fits my fermentation vessels perfectly

Perfect for what I was needing it for. Easy to use. Did have a strong odor.

used to put straws in our mason jars for kids to drink with lids.

I purchased a few new fermenter which lacked grommets. These answered my prayers. They fit perfectly and easily hold my airlocks in place. These are great for fermenting anything you desire. If you need some, grab these!

Only three stars because I ruined a lid by following the instruction for a 5/8” hole. Put the gromment in that size hole it it also falls out and even with the airlock in it is still loose. Best hole size is 1/2” or even a 7/16. Another reason for the 3 star is that I had to buy a 5/8” bit because my largest bit was a 1/2”. So fair to say their description and advice for hole size cost my an unnecessary purchase and a ruined lid.

Works great in my home made fermenting lids. Drill the hole, insert grommet... there will be a little slack ... then insert hydro-lock, which tightens the seal. Great to have spares on hand

Need to find more uses for them as there are so many.