27mm Phase Contrast PH3 Ring for Leitz Microscope Retrofit Compatible

Microscope Darkfield Set 30mm Insertion Diameter

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

Microscope Phase Contrast Rings 30mm Insertion Diameter

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

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

COMBO - 15mm Microscope Linear Polarizing Filter and one 1/4 Lambda Wave Plate

27mm Phase Contrast Set for Leitz Microscopes Retrofit Compatible