Single stem tube brushes

 for hand use have a long wire handle with a loop on the end and are 6" to 16" in overall length. Brush diameter sizes for the single spiral brush range from 1/8" up to 2" diameter. The brush part ranges from 1" long to 5" long.

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 ¼" up to 2". The overall length of the double spiral tube brush ranges from 4" to 5 ½". 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