Olympus Microscope Drop-in Lens Filter LB-45 Blue 45mm Diameter.

Microscope Blue Color Filter 45mm-32mm Professional Glass Slides Biological

Microscope 45mm Translucent Blue Filter

Microscope Filter Optical Glass Diameter 45mm Green Blue Yellow White Red

Transparent Optical Filter Diameter 45mm Frosted Glass for Biological Microscope

Microscope Color Filter Green Blue Yellow Red Clear Glass 32mm 35mm 42mm 45mm

AmScope 32mm Blue Color Filter for Compound Microscope

32mm-45mm Compound Microscope Optical Filter Color Absorber Green Blue Yellow