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″ Thread Size: 1/8 NPT 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. Made of nylon bristles