These are the rubber rollers which fit on the spindle on the left hand side of a microdrive unit and drive the tape. They are often worn and although you can normally double their life by turning them upside down, I have seen ones from QLs with a great ridge in the middle where both halves have worn down considerably!
Unfortunately, as the quality varies when they are made (and Louis has selected the best ones for me), this is reflected in the price.
The new replacement rollers will soon be available for £4 each plus postage.
