General description The Inner Tube 4.10/3.50-4 with a bent valve TR87 is designed for use in sack barrows and trolleys. Made from high-quality rubber, these tubes are durable, strong, and provide excellent sealing, elasticity, and resilience. They are a perfect replacement for defective air chambers, ensuring stable air pressure and a good damping effect. Technical specifications Size: 4.10/3.50-4 Valve Type: Bent valve TR87 Maximum Inflation: 30 psi Material: Rubber Color: Black Package Content: 2 x Inner Tubes (Tires not included) Installation Before installation, check the inner tubes for leaks by submerging them in water. If bubbles form, the tubes are damaged. Do not pierce the tire with sharp objects during installation. Usage These inner tubes are suitable for two-wheeled hand trucks, small garden carts, garden trailers, lawn mowers, and other similar applications. Inflate using a manual pump only. Other information The white powder on the inner tubes is a non-stick powder used