There are two cleanout brushes that come with the INOV8 and Kingbuilt Waste Oil Boiler Systems. The first image is the head of the 1.5" Boiler Cleanout Brush. The second image is the 2" Boiler Cleanout Brush. They can be purchased individually.
SKU : KBB-450 : 1.5"
SKU : KBB-448 : 2"