Although the inside diameter is 16 mm in the description of item, it is actually 17 mm. I wanted replacement because the item I wanted is 16 mm, but I was not able to do so because I ordered it. I want you to display it in actual item in actual size.
I am satisfied with building very firmly. But it is "hard" for that reason. It is hard anyhow. You can not let things pass unless you can open it with a flathead screwdriver. The difficulty is that it takes time to deliver. You have to order here with room.