Replacement Eyepieces for most microscopes that use 30mm eyetubes.  All Metal Frame with crisp flat field optics.  We replace many plastic Nikon E200 eyepieces that have broken with these and they work perfectly.  Image is as good or better than the Nikon eyepieces.  Includes diopter and accepts a 26.5mm reticle with easily accessible reticle mount.  Pricing is for one each.
 
Photos show installation on a Nikon E200.