Bell Jar Vacuum Suction Unit
* Vacuum suction base
* Polycarbonate (PC) bell jar
* Electric bell (2 AA battery required, battery not included)
* Sound barrier sponge
The bell jar can be used for the following demonstrations:
(1) Bell-in-a-vacuum-jar sound experiment.
(2) Boiling water in a vacuum.
(3) Air pressure.
(4) Cool air compression.
(5) Water fountain.
Bell jar dimensions: 5 1/2" (ID) x 8"