Vacuum Pump, Without Gauge

Simple hand-actuated vacuum pump with a quick-release valve.

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Storm Glass Necklace

Storm Glass Necklace
The liquid inside this striking pendant undergoes interesting and unusual crystal growth in response to changing weather conditions.

Demonstrate the effect of a partial vacuum on inflated balloons and other objects with this easy-to-use pump.

The pump removes 15 mL of air with each squeeze of its comfort-grip handle and pulls a vacuum down to 50 mm of mercury.

A release valve lets you release the vacuum without disconnecting the pump from the line.

Includes 30cm of 9mm-ID tubing and instructions. Without gauge.

More Information
Length (cm) 18
Width (cm) 4
Height (cm) 27
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