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Pair of Industrial Suction Cups (3.25 inch dia.) with handles and release stubs, also known as Magdeburg Hemisphere, 100 newton (22lbs) separation force.
· Demonstrates air pressure without a vacuum pump
· Rubber
· 7.5cm diameter
· Each hemisphere has 2 release posts and 2 finger tug handles
· Place the edges of the two hemispheres together and squeeze to force out the air between them.
· Great for fixing dents, holding a surface, or doing a science education vacuum experiment
