Support and Wholesaling. Weofferdiscountforlargequantity.Welcometocontactwithus! Production Process:Injection molding Hardness: 90 Fit to : Xiaomi 1st 1s ; Roborock S5 S55 S5 MAX S7 Colour:black Material:rubber Size:7 x 7 x 1.8CM Package Contents: Tires Only the above package content, other products are not included. Note: Light reflection 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. Payment : 1.Payment must be made within 5 days of order. 2.If you can't checkout immediately after auction close, please wait for a few minutes Shipment: 1.We supply World shipping. (except few countries and APO/FPO). 2.All orders will be processed first time once the payment verification passed. 3.Actual delivery time may be different , particularly during the holiday season. Feedback: 1.Please make sure that there is no problem with the products. 2.If you have any dissatisfaction, please contact us before completing the review.We will give you a satisfactory answer. 3.If there is no problem, please give us 5 stars positive feedback.