Free-Standing Wooden Lens Holder for 50mm Lens Racks & Stands_Test Tube Racks Compact 38mm acrylic six-piece lens

Compact 38mm acrylic six-piece lens set covering convex

Compact-format sonometer designed to study the physics of vibrating strings on a footprint smaller than the standard 1-meter teaching unit

Built on a leveled cast-iron base with a dual-angle polymer top

Thirty-two-inch advanced pulley demonstration set with 8 singles

Converts chemical energy to electrical through a zinc-copper-sulfate redox couple

Free-Standing Wooden Lens Holder for 50mm Lens Racks & Stands_Test Tube Racks Compact 38mm acrylic six-piece lensHolds 50mm diameter lenses upright on a free standing wooden base, the simple mount steadying optics elements at bench height for refraction, image formation, and ray tracing demos.