General description The pack includes 2 tube tires designed for 4.10/3.50-4 inch applications, suitable for sack barrows, trolleys, handcarts, garden carts, lawn mowers, and more. Made from isobutylene isoprene rubber, these inner tubes offer superior airtightness, elastic cushioning, and aging resistance compared to natural rubber. Technical specifications Size: 4.10/3.50-4 inches Material: Isobutylene isoprene rubber Inflatable Valve: TR87 Angle Stem Maximum Inflation Pressure: 30 PSI Dimensions: 260 x 85 cm Weight: Not specified Compatibility and accessories Compatible with various carts, including hand trucks, garden carts, lawn mowers, small tractors, wheelbarrows, and more. Fits Baja Motorsports (DN65) Go-Kart, Bladez models, EvoSPX, Pro Hoveround, and several Yerf-Dog models. Installation Ensure that the spaces are completely sealed by submerging them in air during installation. If bubbles appear, the tube may be damaged. Usage Inflate using a hand pump only. Designed for