Replacement M4 Knob for Rack & Pinion Telescope Focuser
Description
This is a replacement knob for my Meade DS-90 EC refractor telescope. It fits an M4 screw through the knob into an 8.2mm diameter rack & pinion focuser shaft. This seems to be a common size for lower-end rack & pinion focusers (refractors and reflectors).
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