Refractometer calibration solution is used to accurately calibrate your refractometer for testing natural sea water or synthetic sea water. Specifically manufactured for calibrating refractometers for use in testing natural or synthetic sea water. Clean refractometer prism slide with clean fresh w...

A multi-purpose drawing tool made from high impact plastic for students, artists, and designers. Graduated in both English and metric. Includes many useful formulas and conversion factors. Draw horizontal and vertical parallel lines with ease. Draw circles, curves, or arcs. Use the built-in protract...