Cover glass is a thin, flat glass sheet of transparent material, usually square or rectangular, about 20 mm (4/5 inch) wide and a fraction of a millimeter thick, and placed on an object observed with a microscope.
Can collect syringes, infusion sets, disposable needles; collect medical small glass products, various types of blades, scalp needles, suture needles and other sharps; collect blood-filled syringes, blood transfusion sets and other medical equipment that contact blood;
It is used to separate the solid particles in the suspension from the liquid, or to separate the two liquids with different densities but incompatible with each other in the emulsion.