inside measurement is off. Maybe just my piece, but I used a caliper I use on parts for musical instruments I make which has to be exact. Also it not quite a perfect circle slightly elliptical. That makes it even harder to put on. So where you plan on using it is slightly less then 1"-beware
Pros: good product great value
Cons: not quite an inch on the inside-not exactly circular
This review was written in the old system and had content requirements that are different than reviews written today.