Dixon Phano Nontoxic China Markers, Nontoxic, Paper Wrapped, Black, Ideal for marking on glass, plastic, film, paper, metal, rubber, almost any surface. Bright colors deliver vivid marks. Marks easily wipe away clean from any smooth surface.
Ray box, simple, safe and sturdy source of projected light for many classic optics experiments, produces parallel convergent rays across a plane horizontal surface and the rays are intense enough to be traced in natural light. Built in solid aluminum extrusion casing, 100-240V 50/60 Hz
Blade number:20 Disposable Premiere* Blades are made of high carbon steel, individually foil wrapped and sterilized by gamma radiation. 10 per pack; 10 packs per box,For number-4 scalpel.
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