a clapper to fit
https://www.thingiverse.com/thing:4176717
and insired by
https://www.thingiverse.com/thing:6719804
i designed my own clapper with no supports ,cone or round ends with or without holes for string/ribbon .
2 rings, ring b is split so that it can be slipped into ring a . one side of the split in ring b is a little smaller that the other to help with fitting

you will have to resize in your slicer to fit your bell , this one is for my 50% sized bell

Creality

Ender 3 Pro

No

No

200

15 and 100

clapper and end is 15% infill but the rings are 100% infill (sorry for the quality of my rings in the photos,one of these days i will get my settings right )