Collars are metal rings that fit over the ends of pipes or openings to conceal rough edges. This helps the end blend in with surrounding surfaces They are threaded in the middle with holes of varying widths. Currently, we offer one #2 all brass collar with a flared bottom and holes with widths of 1-1/4" on top and 2-1/4" on the bottom, another #2 with threads of 1-1/4" and 1-3/4", and a heavy gauge special brass collar for central draft burner No.22567 that has a 2-3/4" top thread and 2-7/8" bottom.
We also offer a No. 00 Nutmeg brass collar for oil lamps with a thread of 5/8" and a 1" bottom as well as reducing collars that can connect #1 male and #2 female threads or #1 and #2 burners.