Board Thread:General Nerf discussion/@comment-27306930-20200306034220/@comment-30049823-20200306071307

Actually, the Amazon listing you linked to has lots of dimensions shown in the 2nd-to-last image. 4cm diameter on the seal, so, slightly less than 1.5" diameter balls?  They might be bigger than the Atomic Power Poppers... but I'm 100% positive they're smaller than Nerf/Larami ballistic balls.

Same basic mechanics and operation as the Reactor, though.