Black Inner Tube 8 1/2X2 for Xiaomi Mijia M365 Electric Scooter Wheel Tyre Tires Specification: Product Name: Replacement Inner Tube Material: Butyl Rubber Quantity: 1 piece Valve Stem: Straight Tube Size: 8 1/2X2 Compatible with: for Xiaomi Mijia M365 Electric Scooter Hoverboard Skateboard 8 1/2 X 2