Micro Pinion Assembly, fits Takahashi Epsilon E130/E160 as well as the Mewlon Cassagrain focuser.
Details:
https://www.starlightinstruments.com...mm-telescopes/
This cost me around $800 to import from the US late last year.
Perfect condition - I've since upgraded to an Optec Leo.
$300.
Price is firm and includes shipping anywhere in Australia.