【PERFECT COMPATIBLE】Perfectly compatible with iRobot Roomba 900800700600500 Series Vacuum Cleaner 560 650 690 770 860 890 960 980. 【INNOVATIVE DESIGN】 We are a professional company for manufacturing and selling spare wheel for iRobot Roomba spare wheel, designed for long life, is rigorously tested for accessory compatibility and duration. 【HIGH QUALITY AND EASY INSTALLATION】Made of high strength and environmentally friendly material , no tools needed, simply insert and remove like OEM, snaps securely into place and can work right away. 【VALUE KIT】You can get 2 packs of front wheels, keep your Roomba running at peak performance. 【EASY TO INSTALL】Replacement parts are easy to install and save a lot of time. Front caster for replacement parts for iRobot Roomba 500/600/700/800/900 series vacuum cleaner Tips: 1. If the front wheel doesn't spin, squeak or fall off, it's time to clean it. 2.Replace the universal wheel every 2-3 months, depending on how often you use it. 3.Snap the parts in