Thank you very much for viewing this product from among many others. We have a proven track record of selling over 700 Roomba units, so you can rest assured that your transaction will be handled with care. We are confident in our ability to provide excellent service and products. We believe we can offer a transaction you can feel secure about, as we have a history of numerous transactions based on the quality and service that cannot be expressed by price alone. Great value item!! After using a Roomba for several years, the tires will wear down, causing the Roomba to slip. Are your tires worn? You can replace them at a very reasonable price. (Easy to replace with a Phillips head screwdriver, even for women) [Product Contents] iRobot Roomba Genuine Tires, Left and Right, with Screws, Blue Tire Module, Tested and Working The tire rubber is hardly worn, and as you can see in the photos, it is in near-new condition. This is a great deal, offered at a special price. A new one costs over 8700 yen on Amazon (see photo). Compatible with 500, 600, 700, 800, and 900 series (not compatible with i, e, and j series) Since it is not new, there may be very slight dirt. (This does not affect the operation at all.) Please understand this before purchasing. Please refrain from purchasing if you do not understand. If you want a completely new and unused product, please purchase a more expensive product from another store. We have plenty of stock.