My
boat has a lot of Fredricksen blocks which use Delrin ball bearings.
They're sun damaged.
Although easily replaceable, I have been unable to find a source.
Ronstan acquired Fredricksen a few years ago, but everywhere I've checked I get the "Just replace the blocks".
There are several blocks on the
boat, and they're otherwise perfectly serviceable.
The closest I've come is McMaster Carr, but they don't have metric sizes.
Any source would be much appreciated.