Concave Glass Mirror, 50mm Diameter, 150mm Focal Length Pack Size_Single 3g nickel-plated steel balls on

3g nickel-plated steel balls on a red wood base

Tandem double plastic pulley pairing 38mm and 50mm low-friction wheels on an open-sided steel frame

supplying a hands-on teaching tool for atomic and molecular orbital visualization in introductory and advanced chemistry

providing dense uniform spheres for ramp-and-collision experiments where a heavier projectile is needed than the plastic marbles can provide

with lengths varying by density to isolate the mass-volume-density relationship for student investigation

Concave Glass Mirror, 50mm Diameter, 150mm Focal Length Pack Size_Single 3g nickel-plated steel balls onConcave glass mirror, 50mm diameter and 150mm focal length, the f 3 curvature stretching the focal throw for demos that need the focal point set comfortably beyond the mirror face.