US$ 35.00
with thumb-wheel jaw movement for fine dimensional precision
Suspends a 20mm solid zinc cube from a spring scale for water-displacement density measurement
375-inch base
Double-pole double-throw brass knife switch
Pack of 6 borosilicate 3
Free-Standing Wooden Lens Holder for 50mm Lens Human Anatomy_Human Anatomy Charts & Models with thumb-wheel jaw movement forHolds 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.
US$ 35.00
US$ 36.00
US$ 34.00
US$ 13.95
US$ 62.00
US$ 125.00
US$ 42.95