This is a Helin 3700 woodwind brush, the head is about 45mm long.
Helin Trumpet Mouthpiece Brush
Helin E3500 Mouthpiece Brush for Brass Instruments
Helin Brush For Mouthpiece - Woodwind Instruments
Helin Trumpet Valve Cleaning Brush
HELIN. 3200. Trumpet Mouthpiece Brush. For Trumpet Mouthpiece. Wire handle.
Helin Trombone Mouthpiece Cleaning Brush
