General description New, high-quality materials ensure that the For 7490 Eternal main side brush and HEPA filter are well-made and highly compatible with the equipment. Clean accessories enable your home robot to maintain optimal performance while reducing dust, pollen, and other allergens from seeping into the air you breathe. Accessory contents are easy to remove and replace as part of routine maintenance, and it is recommended to replace cleaning accessories every 2-3 months based on usage frequency. Technical specifications Material: Plastic Package Contents: 1 x main brush, 6 x side brushes, 6 x filters Measurement allowed error: +/- 1-3 cm