Weiler 21122 7/8" Power Tube Brush.006" Stainless Steel Wire Fill, 2-1/2" Brush Length, Made in The USA (Pack of 10): Amazon.com: Industrial & Scientific
Tube Brushes with Shank-Double Spiral (SUS WIRE) | Taiwantrade.com
Industrial Brushes | Custom Designed Brushes | Twisted Wire Brushes | The Mill-Rose Company
Double Spiral Tube Brushes for Powered Use } Precision Brush
WEILER 0.875 in Power Double Spiral Tube Brush, Double Shank, 2 1/2 in Brush, 5 1/2 in Overall Length, 1 EA - 61CY63|91023 - Grainger
WEILER 0.625 in Power Single Spiral Tube Brush, Single Shank, 1 in Brush, 3 1/2 in Overall Length, 1 EA - 61CY56|91014 - Grainger