GXM- 0.45X C-Mount Eyepiece Adapter, to fit eyepiece tube with inner diamter of 23.3mm. This adapter is deigned to be inserted into any eyepiece tube of a microscope that has an inner diameter of 23.2mm. This is the standard diamter of a large proportion of biological and materials upright microscopes. It is not suitable for stereo microscopes but we have inexpensive adapters for these.
You can use this adapter to attach any c-mount microscope camera to your microscope. It simply screws onto the thread at the top of the adapter.