General description Inner tube 4.10/3.50-4 with a bent valve TR87 is designed for sack barrows and trolleys. Made from high-quality rubber, these tubes are durable, strong, and provide excellent sealing, elasticity, and resilience. They are ideal for replacing defective air chambers in various applications, including hand trucks, garden carts, trailers, and lawn mowers. Technical specifications Size: 4.10/3.50-4 Valve Type: Bent valve TR87 Maximum Inflation: 30 psi Material: Rubber Color: Black Installation Before installation, ensure the inner tubes are completely sealed by submerging them in water. If bubbles appear, the tubes are damaged and should not be used. Usage This inner tube is suitable for various applications, including: Hand trucks Trolleys Garden trailers Dollies Lawn mowers Other information The package includes 4 inner tubes. Tires are not included. The white powder on the inner tubes is a non-stick powder used for protection.