I bought this about 6 days ago to try some sheels through it. I now have about 5 different chokes so I am cleaning them out now. I just placed this one on ebay. Its still brand new with maybe 10 shells fired through it!
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330108979315
its the .655 size and fits a remington 12 guage