This replacement is compatible with Shark Rotator Pro Lift-Away NV500 NV501. If you are not sure about the model, please contact customer service before purchasing. Convenient disassembly, simple installation, and promptly clean up the entangled hair on the roller brush. Regular replacement roller brushes will help to maximize cleaning performance,Especially in home with pets,recommend to replace the roller brush every 2-3 months. The filter keeps the robot clean while reducing the penetration of dust, pollen and other allergens into the air you breathe. In order to achieve the best cleaning and filtering effect, the filter should be replaced every 2-3 months according to the use frequency. Material:plastic colour:As Shown Package Contents: 1 x sweeper brush Only the above package content, other products are not included. Note: Light shooting 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.