Description
5 mm in diameter
Hand-painted 4-part human brain model separates into cortical hemispheres and brain-stem regions for lobed-anatomy teaching at introductory biology levels
Engineered with a higher spring constant than a classic coiled novelty spring
5 inches with a brass-chrome water wheel in a 10cm aluminum casing
3m Wave Form Helix Spring for Wave Motion Demonstration Science Classroom 5 mm in diameterClosing to 3m and extending to 9m, this 20mm diameter steel helix carries longitudinal, transverse, and standing waves visibly enough to compare amplitude, frequency, and S wave vs P wave behavior.
Exchange/Return Notes
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- Final sale items are not eligible for returns or exchanges.
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