The glass bowl filter that Carter sold that was mounted at the carburetor inlet had a porous ceramic filter that did an excellent job of catching tiny particles that could clog carburetor passages and cause flooding if they got stuck in the float valve. They come up on Ebay pretty frequently. The ceramic insert can be cleaned, blown out with compressed air, and reused without damaging it.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!