US$ 151.00
with thumb-wheel jaw movement for fine dimensional precision
375-inch base
Pack of 6 borosilicate 3
Eight aluminum-shank tuning forks tuned to scientific pitch (C4 = 256Hz) and ranging from 5 9/16 to 7 1/8 inches
Double-pole double-throw brass knife switch
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$ 151.00
US$ 337.96
US$ 326.00
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