27mm Phase Contrast PH3 Ring for Leica Microscope Retrofit Compatible

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

Microscope Phase Contrast Rings 30mm Insertion Diameter

27mm Phase Contrast Set for Leitz Microscopes Retrofit Compatible

27mm Phase Contrast PH2 Phase Contrast Anullus for Leica Microscopes

Leica Microscope PH2 Phase Ring Retrofit Compatible

Leica Microscope PH3 Phase Ring Retrofit Compatible

Leica Microscope PH1 Phase Ring Retrofit Compatible