Cleaning Brush Thread : M12; Material: Steel , Iron; Total length: 190 MM / 7.5 INCH; Diameter: 150 MM / 5.9 INCH Made of steel, the bristle brush is durable enough to thoroughly clean rust and fine details. The M12 male pipe threads is easy to assemble and disassemble. The wire bristles are firmly attached directly to the rod. Use a cleaning brush to pass through the flue/pipe to brush off the dirt in the pipe; then use a detergent to clean it; finally rinse it with clean water. Routine chimney cleaning can help prevent flue fires, and cleaning with a brush is more effective.Spiral knotted construction, suitable for pipe deburring, rust removal, spatter and paint removal on narrow surfaces, internal cleaning and rust removal of pipes, chimney, etc. The cleaning brush is coated with anti-rust oil and is not dirty.Manufacturer: PATIKIL Model Number: pta230724tt000911 Part Number: pta230724tt000911 Size: 150mmRoutine chimney cleaning can help prevent flue fires, and cleaning with a brush is more effective. Spiral knotted construction, suitable for pipe deburring, rust removal, spatter and paint removal on narrow surfaces, internal cleaning and rust removal of pipes, chimney, fireplaces, ventilation ducts etc.SpecificationThread : M12Material: Steel , IronTotal length: 190 MM / 7.5 INCHDiameter: 150 MM /5.9 INCHAdvantageMade of steel, the bristle brush is durable enough to thoroughly clean rust and fine details. The M12 male pipe threads is easy to assemble and disassemble. The wire bristles are firmly attached directly to the rod.Instruction Use a cleaning brush to pass through the flue/pipe to brush off the dirt in the pipe; then use a detergent to clean it; finally rinse it with clean water.NOTE: The cleaning brush is coated with anti-rust oil and is not dirty.