| Country of Origin | As the description shows |
|---|
Check the listing for details. Vacuum Bell Jar Vacuuming Demonstration Hood Teaching Tools. Condition: New, Made in As the description shows. Listed at 40.19 USD. 1 x Vacuuming Plate. Feature: 1. Vacuum Sound Jar: Place the electric bell in the jar, and you can hear a clear bell, and then pull out the air, the bell will gradually weaken until no sound can be heard.
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