COMPATIBLE WITH M365 INNER TUBE: This 8.5x2 inch air tire inner tube is designed to be compatible with M365 tires. It features a 2mm thickness, which is thicker than standard, and is packed in a set of 2 pieces. Each inner tube weighs 125g and includes a straight valve stem for easy use. SUITABLE FOR VARIOUS SCOOTERS: Compatible with a range of scooters including models from Razor, Bladez, Gotrax, Crazy Kart, and others. This 8.5x2 inch inner tube is ideal for air tire scooters, gas-powered scooters, DIY scooters, bird scooters, mini-bikes, and e-bikes. IMPROVED QUALITY BUTYL RUBBER: Constructed from high-quality butyl rubber with increased thickness for enhanced durability. Offers good resistance to punctures, wear, mineral acids, and aging. Performs reliably in extreme temperatures ranging from -60°C to 180°C. Provides a smoother, safer ride on uneven surfaces. EASY INSTALLATION: Simple to install and remove. Ensure the valve is properly aligned during installation for optimal performance. Color: Black Material: Butyl Rubber Package Contents: 2 x Inner Tubes Note: The product package includes only the items listed above. Light and display settings may cause slight variations between the image and actual color. Measurement may vary by +/- 1-3 cm.