27mm Phase Contrast PH3 Ring for Leica Microscope Retrofit Compatible

Leica Microscope PH1 Phase Ring Retrofit Compatible

Leica Microscope PH3 Phase Ring Retrofit Compatible

27mm Phase Contrast PH2 Phase Contrast Anullus for Leica Microscopes

Phase Contrast Set 27mm Diameter Compatible w/ LEICA Microscope

Leica Leitz Microscope 513637 Ph1 S95 Phase Ring for Condenser, 29mm OD

27mm Phase Contrast Set for Leitz Microscopes Retrofit Compatible

Leica Microscope PH2 Phase Ring Retrofit Compatible