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 Gauge: 4.10 / 3.50-4 Feature: Inflatable Valve: TR87 Bent Stem Ply Rating: 4 Max Inflation: 30 PSI Package Including: 2 Pieces of Inner Tubes Compatible Models for Reference Mower Hand Trucks Wheelbarrows Dollies Small Tractors Yard Wagons Compatible Models for Reference Yard Trailers Wagon Carts Wagons Generators Snowblowers Pressure Washers Air Compressors Wood Chippers Universal causes of tire and tube failures: A single puncture or a small hole usually comes from a thorn, a wire or a small nail. These can be repaired. Check the tire as well for thorn, etc., then remove it. Double splits are usually the result of a rim pinch. The tube was pinched between the rim and an object in the road/trail. Increase air pressure or use wider tires. Rash causing a large jagged hole. These are generally not repairable. Also check for damage to tires and rims. A cut or tear for a long time can also indicate a tire explosion. As a rule, it is not repairable. Use caution when settling into a tire during installation. Inspect Before Installation Inspect the outside of the tread for any nails, pieces of glass, thorns, or other protruding objects. Visually inspect the inside of the tire casing for nails, glass, or debris. Wipe the inside of the case with a cloth, then carefully feel the inside with your fingers. Be careful if you use a tire iron. The tire lever is very easy to drill a hole in your inner tube. Inspect both sides of the tire for bead seating and for any sign of tube popping. Reinstall if necessary. How to inspect the hole on the inner tube Inspect for air leaks by holding the tube close to the sensitive skin of your lips or near your ear. Move the tube around its circumference. If these steps don't work, push the inner tube into the water and watch for bubbles in the hole.