The 2 Star Excelta Corporation 267A Fiberglass Scratch Brush Refill has a 0.125" diameter and is made in Germany.
Excelta Scratch Brushes are retractable and refillable with plastic handles. They can be used for fine deburring, polishing, rust removal, or cleaning and erasing in chemical etching processes. Excellent for pre-solder and contact cleaning. Overall length is 4.75" and 0.375" round. Brush is 0.125" diameter.