This grommet is fairly thick and works well with modern style bowls like those that come with MYA hookahs, vortex bowls and funnels. Any bowl with a fairly wide opening at the base will require a thick grommet or require you to stacks thinner grommets. For bowls with a smaller opening I prefer silicone grommets or “Traditional Grommets”, which are thinner.
My only real complaint with these grommets is that they are a big rigid. I have one thick modern grommet for a long time ago that is similar in design but made of a very pliable material. It’s much more rubbery and makes a perfect seal. When I first got my hands on one of these I was hoping that they would be the same. No such luck.
7 out of 10. These are the standard bowl grommets that come with many modern hookahs and they are great but could stand to have a little more give. They are good and work well with many bowls. If you need a new bowl grommet I would suggest this one because it should fulfill your requirements quite well.