High performance inner tube with TR87 bent valve stem, 30 PSI max air pressure. Inflation only with a hand pump This hose is made of isobutylene rubber, which is better than natural rubber in terms of airtightness, resistance to elastic D and resistance to ageing. Do not repeat 4.10-3.50-4 inch inner tube works with hand carts, garden carts, lawn carts, lawn carts, carts, generators, carts and most 410/350-4 wheels Perfect fit for 4.10/3.50 - 4 inch tires - Spare inner tube for 4.10/3 tires ,50-4 - Outer Diameter: 10" Also measured in 4.10 3.50-4, 410/350-4, 3.5-4, 4.1/3.5 4, 4.10 3.50 4, 4.10 3.50-4, 4.10/3.50-4, 4.10/3.50-4. 4.1", 4.1", 0 x 3.50-4 inch Customer Satisfaction: Before installation, check whether the pipes are completely sealed by putting them in the water. If there are bubbles, are they already bored?