Anti-slip Threshold Door Step Ramp Kit For Inteligent Robot Vacuum Cleaner FG05 Features:100% new and high quality Package include all kits show in pictures which option you selected above. With a 2 inch rise that makes door access easy, this premium scooter and wheelchair ramp gives freedom of movement to everyone. Beveled sides provide a smooth transition from either side of the rubber ramp, with reasonable height, adds convenience for Robot Vacuum Cleaner. Non-slip texture surface of the ramps will increase friction and prevent from skidding to ensure the safety. The tape at the bottom is more stable and wont move easily. Package Includes: 1 Set Threshold Ramp Specifications: Material: TPE Size: As Shown Color: Black, Gray, White, Yellow(optional) note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3.Before placing an order, be sure to confirm that your device model is the relevant fit model mentioned on this product page, you can check the specific product model number on the nameplate at the bottom of your device (many sweepers have extremely similar names, so you need to distinguish by the specific model number), if you are requesting a refund due to your purchase of the wrong product, you will be responsible for the return shipping costs.