Refractometer Polishing Compound Airflex wheels are constructed from

Airflex wheels are constructed from a specialized material embedded with thousands of miniature air pockets throughout the body

Extra Set of Motor Brushes

Variable speed — 0–160 strokes per minute when used with a compatible variable speed controller (sold separately)

Vent hole on the side prevents fogging during use

Refractometer Polishing Compound Airflex wheels are constructed fromThe GemPro refractometer is a primary gemological instrument used to measure the refractive index of gemstones for accurate identification. Clear optics and an easy viewing lens make readings straightforward, helping you quickly determine one of a stones most critical optical properties. Features Measures refractive index for gemstone identification Easy viewing lens for clear scale observation Designed for professional gemological use Compact