[PRODUCT QUALITY]: Sets Bristle are made of high quality, environmentally friendly materials, but the quality is equivalent to part number[APPLICABLE MODELS]: For roomba replacement 600 and 700 Series 614 620 621 630 635 645 650 655 660 665 670 675 680 690 692 694 695 760 770 780 790 Vacuum Cleaner[PACKAGE CONTAINS]: 3 pair of roller brush,2 pcs clean tools,We recommend that you replace the roller brushes once every 2-3 months to keep your vacuum cleaner working efficiently and to clean the hairs from the roller brushes regularly[EASY INSTALLATION]: Easy to install and replace, no tools required, saves you time, snap-in design allows you to easily open and replace a new oneColour:blackMaterial:plasticPackage Contents:3 pair x roller brush2 x clean toolsOnly 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