3M 60356, Scotch-Brite Roloc Light Grinding and Blending Disc, GB-DR, Heavy Duty A Coarse, TR, 3 in, 7100007318, 100 per case 
Insize ISM-ZS200, PARALLET LIGHT STEREO MICROSCOPE, 6940561935325
$5,746.06
Optical tube binocular(20? inclined)
Eyepiece(wide field) 10X (view field .87″ DIA)
Objective 0.8X~8X (zoom)
Zoom ratio 1:10
Infinity parallel optical system and 20? inclined optical tube reduce fatigue.
Coaxial illumination is optical for deep holes that cannot be observed by ring light.
Aperture diaphragm is optional for large depth for dield and high quality image.
