Static charges lie only on an outside surface and the Hollow Sphere shows it. Charge the sphere by touching it to the dome of a generator. When a proof plane is touched to the outer surface, a charge will be acquired, but when it is touched to the inside surface, no charge is treansferred.
The sphere's re-entrant hole is 4cm.
Sphere:Ø 10cm Height:26cm long.
Wabash Model #N-121.
Forensics Lab Supply Number 3178121.
Purchase orders may be sent by email to Staff @ grauhall.com or by mail to 8524 Erinbrook Way, Sacramento, CA 95826.
All products shipped from Wabash, Indiana.