A quick learner from Pinedale Wyoming says:
What are the dimensions of this bumper tip replacement?
Inside circumference and length please.
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Mike from SWISCO responded:
The dimensions can be found on the item webpage. Here is the photo, in case you missed it.

The inner diameter is 3/8". If you truly need the inner circumference, it's not going to be a clean number, but it's equal to pi times the diameter, which is 1.178" or around 1-23/128".
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