P11- 3mm Shank, 5mm pink cylinder grinding stone Pink cylindrical mounted grinding stones. Great for grinding, polishing and shaping metal, stone, tile, glass, etc. Can be used in electric drills, electric grinders or other rotary tools.
Humboldt State University ® Department of Chemistry Robert A. Paselk Scientific Instrument Museum The Chemical Refractometer 1874 - 1970 Richard A. Paselk, Curator Refractometry has been a major tool in the chemical laboratory to determine concentrations of solutions and as an aid in identifying unknown substances since the late nineteenth century.
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