Authentic Condenser Nylon Tube Brush Sizes Available: 3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/8″, 1-1/4″ & 1-1/2″ Used in power operations where polishing, surface conditioning, deburring, and cleaning operations are needed Ideal for cleaning bottles, carburetors, brake cylinders, radiator hoses, engine blocks, blocked hoses, drains, etc. 1/8 NPT Made of nylon bristles