8.5 inch x 2 inner tube replacement for scooter: the hose is designed for 8.5 inch electric scooters, 8 1/2 x 2 tyres e-scooter is compatible with most models such as Xiaomi M365 / M365 Pro/Pro 2/1S, Gotrax GXL V2/XR Cotec Bongo A series and other 8.5 inch electric scooters. compatible High-quality material: the e-scooter hose is made of high-quality butyl rubber. This e-scooter hose 8 1/2 x2 has good penetration and ageing resistance as well as a high resistance to mineral acids and abrasion, which ensures stability and driving comfort. The cushioning is better and easier to install than solid rubber tyres Silver straight valve: straight valve design for easier installation. Our 8.5 inch hose valves are made of the finest quality silver, which is of better quality than copper and does not rust. Our sturdy, well-made metal valves are engineered to withstand higher pressure and allow for a more stable and safer ride. Thickened and durable: This thickened design butyl rubber tube is durable, our e-scooter tube is 2 mm thick, while the others are about 1.5 mm thick, even if the tyre has a breakdown, butyl's high airtightness can form an airtight seal. Silver valves are rust resistant and can withstand higher pressures. Assembly and customer service: 2 x e scooter hose 8 1/2 x 2 litres, please check before installation whether the new hose is fully sealed by placing it in water. If air bubbles occur frequently, it means it is damaged; please contact us to replace it. Do not mount the tyre with a pointed stick. Do not inflate the hose too much without a carcass. If you have any questions hose 8 1/2 x2, please contact us.