the inner Circumference is just under 14mm that makes it perfect to make a 14mm press Well made and easy too use

Good product good company

I like this simple tool a lot. It is well machined and makes a dense plug of keif simply and easily. I prefer to use a substantial amount of keif for each pressing. Doing so makes it easier to insure neither cap touches the barrel, which makes it easier to loosen the caps when it’s time to retrieve the keif plug. This is particularly true if you use wrenches to tighten the end caps. I also like to leave the keif in the press for several days, often holding it in my hot little hand. Doing so promotes “welding” the keif into an even more solid mass, and those large keif plugs can be very impressive to your friends! And delicious! :) I would happily recommend this to a friend.

It's a great little tool. This size is perfect for smaller pressings. It's very easy to use and very simple to figure out. It's very solidly built out of quality materials. I would recommend buying some food grade parchment paper as that will make clean up almost non existent.