Perfect Compatible: Replacement Accessory Kit Compatible for 850 860 861 864 866 870 871 880 890 891 & 900 series 960 961 964 980 981 985 etc vaccum cleaning robots. Innovative Design: Dual counter-rotating extractors incorporate a durable rubber tread design, Soft and wear-resistant rubber, special texture, completely solve the problem of winding, which grab and break down dirt and debris from smooth floor . Hepa Filter: Made of high strength and eco-friendly material, remove any hair or debris, the purification efficiency is as high as 99.98%, filter tiny particles to make the released air more . Replace: We need to replace accessories every 3-6 months to keep the vacuum cleaner in top working condition, Contains everything you need to help maintain . color:Photo color Material:plastic Package Contents: 2 x Roller brush 4 x Side brush 4 x Filter 4 x Screw 1 x Roller 2 x Cleaning tool Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.