Perfect Replacement Kit: This accessory kit fits for iRobot Romba 600 610 620 650 675 677 692 671 694 691 614 615 635 676 670 690 series and 536 551 552 564 585 589 595 series robot cleaners, please check your vacuum model and part.Frequency of replacement: It is recommended to replace the spare every 2 - 4 months to keep your robot clean and high performanceProfessional: Supplementary accessory kits available from professional manufacturers, made with high-quality eco-friendly materialsMaterial:plasticcolour:As shownPackage Contents:1 * Front Caster1 pair * main brush3 * filter6 * side brush6 * screws3 * cleaning tools1 * screwdriverOnly 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.