NIUNIU Package Quantity: You will get a total of 2 duct cleaning tools, including 1 4-in-1 duct cleaning brush and 1 inner and outer reamer for daily duct cleaning and repairs Size Information: Pipe cleaning brush length is 20cm/8, cleaning hole diameter is 1.5cm/0.6, 2cm/0.8, inner and outer reamer diameter is 1.5, reamer is suitable for 3/16 to 1-1/2" pipe diameter Multifunctional design: the cleaning brush has 2 different cleaning diameters, which are suitable for pipes of different diameters; the front and rear ends have different thickness brushes; the handle has a non-slip design and is integrally formed; it is a good tool for effective work Convenient design: can deburr clockwise and counterclockwise, pipe reamer is suitable for inside and outside the pipe; the screw of the pipe cutter can easily control the cutting pressure and achieve a clean cut Multifunctional: Multifunctional manual metal rust removal tool for cleaning steel parts, machinery, unfinished metal parts, paint stains, special corrosion without damaging the surface or its good performance, cleaning, polishing, painting/rusting; make welding A tool to make it super easy and make pipes shine again