Brand new, unused Osborne wire tube brush, approx 5/8″ diameter with ~¾″ brush length mounted on a twisted wire stem. Designed for cleaning and deburring inside small tubes, bores, fittings, holes, and other confined spaces. Constructed with stiff metallic bristles (carbon/steel), this internal tube brush works by hand or can be adapted to tools for light cleaning tasks. Ideal for plumbers, machinists, HVAC techs, and general maintenance use — perfect as a replacement or spare in a tool kit. (Comparable Osborn internal wire tube brushes of ~5/8″ diameter are standard industrial brushes used for internal tube cleaning;
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