1. Size: 4.00/3.50-6 inner tube 2. Replaces carts, garden and utility vehicles, lawn mowers, tractors, wheelbarrows, trailers, wheelbarrows, hand trucks, trucks, generators, snow blowers, pressure washers, air compressors , wood chipper, etc. 3. Heavy duty: Made of isobutylene isoprene rubber, not remade, its air tightness, elastic damping and aging resistance are better than natural rubber. Heavy Duty and Durable 4.Note: Please check the size of your equipment's existing tires/tubes. If it's the right size, it should work fine. Not suitable for highway use5. Easy Installation Features: Inflation Valve: TR87 Curved Metal Stem Color: Black Material: Rubber Package Contents: 4 x Inner Tubes The above package contents only, other products are not included. Note: Lighting and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowance is +/-1-3cm.