The demonstrations feature the fundamentals of vacuum and air pressure as they describe how a pump works and how to find the mass and density of an ai...
Achieve an airtight seal with any bell jar using our economy vacuum plate. The plate measures 24×24 cm, is constructed of polyeythlene and has a rubbe...
This nickel coated plate uses a rubber pad to achieve air tight contact with a bell jar. It features a stopcock and center hole with safety screw plug...
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