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.