Feature: 1. Made of butyl rubber material, it has better air tightness, heat resistance and durability. 2. The butyl rubber tire inner tube can absorb the vibration of uneven roads, thus ensuring comfortable and safe driving. 3. Easy to install, and the old tire inner tube can be easily replaced within a few minutes, which is time‑saving and efficient. 4. Equipped with a Schrader valve, it widly fit 18 inch wheel, width between 1.50‑1.75inch tires. 5. It will never let your bike go flat with a replacement bike inner tube tire on hand. Specification: Item Type: Bicycle Inner Tubes Material: Butyl Rubber Product Color: As Pictures Shown Product Weight: Approx. 119g / 4.2oz Package List: 1 x Bicycle Inner Tubes