[Perfect Fit Part Replacements] Replacement Roller Brush For Irobot Roomba 800 900 Series: All The Parts Are Strictly Tested To Make Sure It Perfect Compatible With Irobot Roomba 805 850 860 861 866 890 891 894 880 870 971 980 960 961 964 990 995 985 And So On. | | [Multi-Surface Rubber Brushes]: To Use Very Soft Wear-Resistant Rubber,Special Grain,Completely Solves The Winding Problem,Higher Garbage Capture Rate, Zigzag Tread Design On The Roller Brush, Strongly Decompose The Debris, Break The Hair,Also 99% Hair Will Be Removed. Compared With Previous Generations, The 800 900 Series Performance Is Improved 51%,Much Effective, Higher Performance. | | Please Check Your Robot Model And Parts Before,We Recommend That Your Clean Robot Extractor Brushes Every 2-3 Uses (According The Amount Of Dirt And Debris) Ordering. | | [Valuable Package