1. [Widely Used] This 4.80/4.00 - 8 inner tube is suitable for household, garden or other general-purpose scenarios. It can be used for lawn mowers, wheelbarrows, hand trucks, garden carts, snow blowers, flatbed carts, yard trailers, trolleys, etc. 2. [JK Feature - Unicycle Inner Tube 4.80/4.00 - 8] This replacement inner tube is made of rubber, with good air tightness and anti-aging performance. The 4.80/4.00 - 8 inner tube is durable. 3. [Safety Feature - 4.80/4.00 - 8 Inner Tube] The maximum inflation pressure of the straight valve inner tube is 30 pounds per square inch. A manual pump is recommended for inflation to avoid over - inflation. It is not intended for road use. 4. [Easy to Install - 4.80 x8 Inner Tube] This inner tube is relatively easy to install. When the tire is flat, there's no need to buy a new tire right away. Just replace the inner tube and it can keep being used. During installation, put the inner tube in water to check if it's sealed. If there are bubbles, it indicates the inner tube might be damaged. 5. Dimensions: 4.80/4.00 - 8 inches Feature: Inflated by manual pump Maximum inflation pressure: 30 pounds per square inch 6. Color: Black Material: Rubber Package contents: 2 tires Only the above package contents are included, and no other products are provided. Note: Lighting during shooting and different monitors may cause slight differences between the color of the item in the picture and the actual object. The allowable error for dimensions is +/- 1 - 3 cm.