Vortex Valve with O-Ring Seals | Discover Science
$1.95
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The vortex valve is a designed to demonstrate how a tornado swirls.
Join two soft drink bottles with this connector to create a vortex in a bottle. With a flick of the wrist a tornado in a bottle is created. Scientific fun. Now supplied with two ‘0-ring’ seals to protect against leakage.
Comes in assorted colours. Bottles not included.