Microscope Darkfield Set 30mm Insertion Diameter

Microscope Phase Contrast Rings 32mm Diameter

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

Phase Contrast Set 27mm Diameter Compatible w/ LEICA Microscope

27mm Phase Contrast PH3 Ring for Leitz Microscope Retrofit Compatible

27mm Phase Contrast Set for Leitz Microscopes Retrofit Compatible

Leica Microscope PH1 Phase Ring Retrofit Compatible

Leica Microscope PH3 Phase Ring Retrofit Compatible