Spare CSB-2 brushes are constructed of high wear and abrasion resistant oil-tempered carbon-steel spring wire. Spare brushes are for the replacement of only the wearing component of the CSB-2 pig. For complete brush assemblies, please see separate category. Options include stainless steel or prostran brush material, or polyurethane blades (see separate category); flat or round wire; customized dimensions for special pigging applications; custom manufactured replacements for pigs manufactured by others.