Free-Standing Wooden Lens Holder for 50mm Lens Racks & Stands_Test Tube Racks Built on a leveled cast-iron

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

suited to bench-scale magnetism work where space is tight or where weaker field strength is required

Front-panel AC/DC and 6V/12V switches on this low-voltage power supply running from 110V input at 2 amps

Pack of 12 low-form Griffin beakers in borosilicate 3

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

Free-Standing Wooden Lens Holder for 50mm Lens Racks & Stands_Test Tube Racks Built on a leveled cast-ironHolds 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.