This inner tube is made of isobutylene isoprene rubber, which is better in air tightness, elastic damping and aging resistance than natural rubber.NOT recap, Totally Inflatable inner tube with 90 bent angle valve stem and a cap; WIDELY APPLICABLE:12.5x2.25 (12 1/2inchx2 1/4inch) Dirt Bike Replacement Inner Tubes product is simple to replace. Believe It doesn't take your much time to change the tire Colour:Black Material:rubber Size:12.5x2.25inch/30x5.7cm Package Contents: 2 * Inner Tubes Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping!