3m Wave Form Helix Spring for Wave Motion Demonstration Science Classroom 3oz each in a 2-pack

3oz each in a 2-pack for double-sized chemistry-themed drinking vessels

Removable full-term fetus in a 16

Four-prong cork-lined retort clamp with an integrated boss head

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

3m Wave Form Helix Spring for Wave Motion Demonstration Science Classroom 3oz each in a 2-packClosing 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.