@utah95 the 7409 was used on any 22.5" kettle with a One Touch sweeper, so '90s MasterTouch and regular One Touch kettles in the '80s included.
Around 2004 the 7444 "H" style (so-called because one part of it looks like an H ...) was introduced and is a direct replacement for machines without an ash bucket.
The older ash bucket holder (it's that collar or ring) depended upon the 7409 mechanism; it is suspended by it and a "hangar bar". But if you ditch the hangar bar the ash bucket holder can instead be suspended by the leg sockets and car radiator hose clamps or baling wire or maybe even screws.
pbe gummi bear did a comprehensive write up about the parts, in the context of a conversion from OTS to OTG here:
http://weberkettleclub.com/blog/2014/03/03/converting-a-weber-ots-to-otg/For 2015 the ash can holder and bucket were redesigned. It's compatible with any 22.5" One Touch kettle that has 7444 sweepers. I use this setup, with 7444, on my '92 Performer and it works great.