I thought I would easily be able to Google up an answer to this but had no luck. It’s been a while since I posted a question last but I know the great folks here will have an answer for me. 
It’s about the sizing of expansion freeze plugs. I have noticed that freeze plugs are distinguished by numbers and that there are 3 different plugs for a 1 1/2“opening (#08, #09, #10). I have a couple of plugs that are wearing out and I am wondering what the difference between a #08, #09 and #10 plug is since they all fit 11/2” openings. Could one of the gurus out here please enlighten me? Thanks!
It’s about the sizing of expansion freeze plugs. I have noticed that freeze plugs are distinguished by numbers and that there are 3 different plugs for a 1 1/2“opening (#08, #09, #10). I have a couple of plugs that are wearing out and I am wondering what the difference between a #08, #09 and #10 plug is since they all fit 11/2” openings. Could one of the gurus out here please enlighten me? Thanks!