This BRESSER WF10x 30.5mm Eyepiece Micrometer is compatible to the following BRESSER models :
Biorit ICD (5802500)
Researcher ICD Halogen (5803000)
Researcher ICD LED/Akku (5803100)
Advance ICD (5804000)
Biorit ICD CS (5802520)
Eyepieces with micrometer scale are created for measurement of samples. For calibration a micrometer slide would be necessary (e.g. Bresser calibration slide with 1/10mm item Nr.: 5916700 and 1/100mm item Nr.: 5916710)