need info about the KFL+ green ball

[RadiusNick]

does any one no the size and material of this ball?
in case you don't know what it is,or not aware of its existence,here's a diagram i found on another forum;(it's supposed to stop the whistling, but in my experience not having it really makes my kayfun airy and obsolete)

and here you may be able to see it obstruct the air hole(because under some circumstances it tends to get dislodged):

 

[bombastinator]

The only thing I know about vaping balls is if they turn green and you lose one see a doctor immediately *pedals away snickering on a red tricycle*