Double stem tube brushes for power use have a double stem, heavier construction with a more dense brush face for more aggressive brushing. Brush diameter sizes for the double spiral construction
range from ?" up to 2". The overall length of the double spiral tube brush ranges from 4" to 5 ?". The brush part ranges from 1" long to 3" long.Fill material sizes range from .003" up to .010".
Standard fill materials include high carbon steel, stainless steel, brass, nylon and horsehair. The stem wire is normally plated carbon steel, but 300 series stainless steel is also standard with
stainless wire. Other stem wire options include brass, copper, and plastic coated wire.