4.10/3.50-4 inner tube, great replacement for hand trucks and other applications that use the same size inner tube. Perfect for most 10" 4.10/3.50-4 wheel applications. Specification Material: Isobutylene Isoprene Rubber Size: 4.10/3.50-4" Feature: Inflatable Valve: TR87 Bent Stem Ply Rating: 4 Max Inflation: 30 PSI Package Including: 2 Pieces Inner Tubes Compatible Models for Reference Hand Trucks Lawn Mowers Wheelbarrows Dollies Small Tractors Garden Wagons Compatible Models for Reference Garden Trailers Carts Wagons Generators Snow Blowers Pressure Washers Air Compressors Wood Chippers Universal Causes of Tire and Tube Failures: A single puncture or small hole is usually from a thorn, wire, or small nail. These may be repairable. Check the tire as well for the thorn, etc., then remove it. Double splits are usually the result of a pinched rim. The tube has been pinched between the rim and an object in the road/trail. Increase air pressure or use wider tires. Blowout causing a large, jagged hole. These are usually not repairable. Also check for damage to the tire and rim. A cut or tear that is long lasting can also indicate a tire blowout. This is usually not repairable. Use caution when seating in a tire during installation. Inspect Before Installation Inspect the outside of the tread for nails, glass, thorns, or other protruding objects. Visually inspect the inside of the tire casing for nails, glass, or debris. Wipe the inside of the casing with a rag, then carefully feel the inside with your fingers. Be careful if using a tire lever. The tire lever is very easy to punch a hole in your inner tube. Inspect both sides of the tire for the bead seat and for any signs of the tube coming out. Reinstall if necessary. How to inspect the hole on the inner tube? Inspect for air leaks by holding the inner tube near the sensitive skin of your lips or near your ear. Move the tube around its circumference. If these steps do not work, push the inner tube into the water and watch for bubbles in the hole.