This replaces bell rings which have been damaged. The same ring is used on all Fox and Renard models with the white bell ring made since the early 1960's.
This ring has been in continuous use since the early 1960's. It won't fit early Fox bassoons with three digit serial numbers. We don't have an exact time for the change, but it would be close to serial number 1000. Those early rings were fabricated out of a plastic that darkened with age to an orangish yellow color. For replacement of those rings please contact the factory for further information.
This bell ring does not usually fit other makes of bassoons, which typically require smaller diameters for the connections.