Reticle 360 Degree Comparator Protractor

KR-810 glass eyepiece comparator protractor. Total of 360° with every 10º marked. Reticles are available in a variety of diameters, select below when ordering.

Overall pattern tolerance: +/- 0.0002" / 0.005mm
Diameter tolerance: +0.00 / -0.005" (0.127mm)
Field of View: 
KR-810: 17mm field of view
KR-810A: 16mm field of view
KR-810B: 10mm field of view
KR-810C: 6mm field of view
KR-810D: 3mm field of view
Lines: Chrome deposition
Chamfer: 0.010" - 0.020"
Glass thickness: 1.5mm +/- 0.2mm
Flatness: 2 waves or better
Centering: Within 0.005"
Surface Quality: 20/10
Parallelism: 2 min.

NOTE: This is a special order product. Please allow 2-3 weeks for delivery. This item is not returnable.