This Is The Chimney Sweep’s Standard Brush.

It is made from heavy duty steel components: 22 gauge (.0286") diameter oil-tempered wire; laid in the four wire, seven gauge spindle two on two, and pre-measured, thus giving a uniform, rugged distribution of brush fill.

The brush is twisted on a 3/8" pipe threaded, plated, machined nipple.

These brushes are used by 90% of the chimney sweeps in the United States for cleaning creosote from wood heating systems.