My experience is Bulb - a 26mm Manchurian (currently own and a favorite) and a 24mm not sure if Manchurian or HMW. The 24mm brush felt so soft I literally checked a few times to see if synthetic knot.
I really like my Azurite stone handle - heavier than the resin and the "colder" temp of stone
I really like my Azurite stone handle - heavier than the resin and the "colder" temp of stone