I found for $12, a pack of two Bailey 12guage to 20 gauge reducer bbl sleeves new in package for break action shotguns….still new in package today, I never tried them in the double bbl 12 guage that I had at the time, and have since sold the shotgun…. May try them in father-inlaw’s double sometime…..I heard Bailey is a good brand…I have no experience with them….