up for sale is a Optical Flat Parallel 80mm - 3.15” (Flatness 0.00007mm - 0.0000028”) Metrology Planglas

NOS- excellent condition

The outside plastic box(grey or white) may be a bit yellowish due to age.

Specifications:

Diameter 80 mm

Thickness 25 mm

Flatness of working surface 0.00007 mm (0.0000028 inch)

Local deviations from flatness of the working surface 0.00002 mm (0.00000079  inch)

Weight 326 gramms 

Made in USSR - Lytkarino Optical Glass Factory


Overall excellent condition

RARE FIND and excellent addition to your collection or project

please check my other listings for other similar items

please look at the photos,youll get exactly the item you are viewing

 the item ships worldwide via registered air mail(up to 25 business days to receive in some cases)

yes,the shipping can be combine(each next item -30% on its shipping)

any questions are welcomed

please pay attention to the shipping price(not negotiable)

GOOD LUCK AND HAPPY BIDDING