This inner tube is made of isobutylene isoprene rubber, which is better in airtightness, elastic damping and aging resistance than natural rubber. NOT recapHeavy duty inner tube with TR87 bent valve stem, max inflation is 30 PSI. Inflate with hand pump only4.10 3.50 - 4 Inch Inner Tube Works With Hand Carts, Carts, Yard Cart, Yard Cart, Lawn Cart, Utility Cart, Flat Carts, Lawn Mowers , small tractors, wheelbarrows, garden trailers, cart carts, wagons, generators, snow blowers and most 410 / 350-4 wheel applicationsPerfect fit for 4.10/3.50-4 inch TIRES/WHEELS: Replacement tubes for 4.10/3.50-4 tires/wheels (10 inch outer diameter). also measured in 4.10 3.50-4, 410/350-4, 3.5-4 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 inch, 4.10x3.50 -4 inchCUSTOMER SATISFACTION: Before installation, check whether the inner tubes are completely sealed by immersing them in water, if there are bubbles, they are already damaged.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''t hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it