Possibly the tiniest brush in the group? -[ HMM ]-

The business end of a small carbon fiber brush for cleaning a phonograph stylus (needle) as safely as possible. The bristle cluster itself is ¼ inch (6mm) diameter; the overall length of the brush is just under 2⅜" (exactly 58mm) long.

 

The very fine-bristled brush, when used correctly, is a lot easier on the stylus and the fragile cantilever (stylus support arm) of a modern cartridge than the time-worn tactic of using your index finger to knock those little dust bunnies off the needle. Of course, keeping records clean minimizes the likelihood of those bunnies multiplying ;).

Done