The 12mm Screw-in Nylon Ferrules are made from a very strong and durable Nylon so they will last for a long time without having to worry about damaging them.
It is 1" in length and 12mm wide so it will line up with your pool stick.
One end has a female screw end, so you can easily screw in replacement tips.
The Nylon Ferrules come in a ten pack so you can easily have replacements no matter how many pool sticks you have or have replacements for a long time.