To evaluate the ID you are going to just have a ruler or tape evaluate and measure straight throughout the open up area Within the ring. Because the ring is round, it doesn't matter if you evaluate horizontal or vertical. To evaluate the OD (outdoors diameter) of the ring, you https://what-is-a-red-ring21864.azzablog.com/5920750/the-single-best-strategy-to-use-for-red-cock-ring-for-ed