The additional bells for the 326 RBA could not be missing.
If the standard bell is fine for tobaccos, these two, Magnus and Radius, are excellent for all other liquids.
The Magnus bell (with holes), is suitable for flavored and creamy liquids, with a predominance of the sweet part.
The Radius bell, on the other hand, is excellent with all the flavored ones with a predominance of tobacco.
2 316L stainless steel screw bells compatible with 326 RBA.