Nylon duct cleaning brush 220mm (for Φ200) sold as a single unit. Suitable pipe diameter (Φmm): 200 Nylon brush diameter (mm): 220 Contents: 1 piece ※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※ Since the COVID-19 pandemic, interest in ventilation has increased. Ducts in apartments and houses are difficult for the general public to clean, requiring the assistance of professional contractors. As a result, the need for a "duct cleaning service" as a new service is rapidly expanding. ※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※ ● Recommended for those who want to start a ventilation duct cleaning service for apartments and houses. ● Recommended for those who want to thoroughly remove dust and dirt without damaging the ventilation duct. 【How to Use】 ① Prepare the nylon brush (this product), a flexible shaft with a socket (sold separately), and an electric screwdriver (sold separately). ➁ Connect the socket of the flexible shaft to the electric screwdriver. ③ Secure the set screws of the nylon brush to the tip of the flexible shaft in two places. (Use a 3mm hex wrench / T-handle hex wrench is convenient) ④ Insert the nylon brush into the duct pipe and rotate the brush with the electric screwdriver, moving it slowly back and forth to remove dust and dirt. ⑤ Vacuum up the removed dust. 【Recommended Driver】 ・Rotation speed: 1000-2000rpm ・Tightening torque: 40N・m or more ・Drill chuck diameter: Compatible with 10mm (keyless type only) with a clutch function ※ Impact drivers are not allowed 【※Precautions for Use※】 ※ Be very careful as the set screws may loosen and fall into the duct. ※ Do not use an impact driver as it may cause a malfunction. ※ By attaching a set collar (shaft collar) (sold separately) in front of the nylon brush, you can prevent the brush from being lost during cleaning. ※ After use, clean and dry the nylon brush thoroughly and store it so that it does not change shape. #DuctCleaningTools #DuctCleaningBrush #VentilationFanDuctCleaning #DuctCleaningTool #DuctCleaningService #KitchenDuctCleaning #ToiletDuctCleaning #BathroomDuctCleaning #DuctParts #DuctCleaning #CommercialSpiralDuctCleaner #SpiralDuct #DuctCleaner