Microscope Darkfield Set of two 27mm Insertion Diameter will fit Leitz / Leica

Microscope Darkfield Set 30mm Insertion Diameter

Phase Inserts For American Optical Microscope - 12.5mm / 16mm Diameter.

Microscope Darkfield Set 31mm Insertion Diameter

Microscope 32mm Mini-Rheinberg Blue Filter Set - Great To Start Or To Evaluate!!

31mm Diameter Circular Oblique Illumination – COL - Microscope Filter Set

Microscope 32mm Set of 8 Annuli + Darkfield Center Stop - Very Interesting Set!!

3.25" Microscope Darkfield Filter Set 2, 4 16 36mm What Microscope