Watch Glass/ Cover Lid for Beakers and Flasks/ Evaporation Dish, Polished with Ground Edges for safe handling, Material: glass, Quality glass, The 2.0mm glass thick construction resists shattering, Can hold small samples to use under a low-power microscope, 2.4in (6cm) in diameter
bottle, borosilicate glass come equipped with an eye dropper pipette for clean dispensing of the stored contents. The clear glass allows for maximum visibility and display of contents. Ideal for labs and classrooms in chemistry applications, Size: 30ml
Double Convex Lens, Highly polished, optically true lens is excellent for physics classroom demonstrations in optics and light refraction, with ground edges, great for physics classrooms, with highest grade, Size: 100 mm focal length, Lens measures 2in diameter, 0.1 weight