Microscope accessories include microscope replacement bulbs, microscope cleaning supplies, microscope carrying cases, objective lenses, replacement eyepieces, microscope filters and microscope stands. Microscope c-mount adapters are brand specific, although there is one generic option for those microscopes where c-mount adapters are no longer made. Microscope filters are listed by size. Reticles and stage micrometers are available in a number of sizes both metric and English. Darkfield and polarizing accessories are available as add-ons to many microscopes.