Microscope Phase Contrast Rings 18mm Diameter

Description

Microscope Phase Contrast Rings 18mm Diameter
For sale:
A set of Phase Contrast Rings with following dimensions.
Phase 1 : 2.50 mm center stop diameter, 0.3mm width of light ring
Phase 2 : 3.75 mm center stop diameter, 0.45mm width of light ring
Phase 3 : 5mm center stop diameter, 0.8mm width of light ring
Phase 4 : 9.5mm center stop diameter, 1.00mm width of light ring
Dark field : 13.35mm center stop diameter, 1.30mm width of light ring
Insertion diameter approx. 18mm (-).
Since this annulus will fit a larger range of microscopes you have to check first the annuli holder(s) your microscope is equipped. This units are made with close tolerance and a preliminary cleaning to eliminate some existing glue traces may be required. The units are not marked and the material used is Delrin black.
Few info about Delrin:
Delrin is the brand name for an
acetal resin
engineering plastic
invented and sold by
DuPont
. Often marketed and used as a
metal
substitute, Delrin is a lightweight, low-friction, and
wear
-resistant plastic.
Please look at the attached picture they representing the item you are bidding for.
Thank you for visiting and looking.