4mm Spring-Loaded Adjustable Slit for Optics Bench Hypotenuse_50mm Aluminum-handled collecting net swings lightweight

Aluminum-handled collecting net swings lightweight through tall grass and air sweeps for classroom field trips and introductory entomology sampling work

Hand-painted female pelvis model exposes ilium

5-inch diameter artery cross sections reveals atherosclerosis

Adjustable parallel-plate capacitor with two 120mm metal discs on an aluminum slide

237kg hooked masses for measuring spring extension under load and calculating spring constants

4mm Spring-Loaded Adjustable Slit for Optics Bench Hypotenuse_50mm Aluminum-handled collecting net swings lightweightSpring loaded 4mm slit on a rod attachment opens and closes smoothly under finger pressure, giving students a continuously variable aperture for diffraction and spectroscopy work.