Permanent & Permanent: Produced from reinforced polyamide and metal for excellent wear resistance Extendable & Direct current Usemail: Simple assembly and extension for full flue coverage, enhancing cleansing efficiency with bother complimentary action High Execution Brush Planumberepeat: Features a twist polyamide brush with pointed fringes and strong rotational power to remove stubborn accounts lacking damaging flue inside Efficient Flue Cleansing: Effectively removes and creosote amassment, reducing flue flame risks while improving ventilation for better combustion and coal efficiency Flexible & Adaptablemail: Soft, large brush head revolves at high pace with a drill, suitable round, square, Manufacturer: Bwuikim