Feature: 1. Butyl rubber inner tube has high air tightness, good resistance to cold and heat and aging resistance. 2. It can be used normally for more than 100 days after inflating, and butyl rubber is the most commonly used inner tube material. 3. The butyl rubber tire inner tube can absorb the vibration of uneven roads, thus ensuring comfortable and safe driving. 4. Simple installation, and the old tire inner tube can be easily replaced within a few minutes, which is time‑saving and efficient. 5. Equipped with a Schrader valve, it widly fit 24 inch wheel, width between 1.95‑2.125inch tires. Specification: Item Type: Bicycle Inner Tubes Material: Butyl Rubber Product Color: As Pictures Shown Product Weight: Approx. 202g / 7.1oz Gas Nozzle Type: Long Schrader Valve. Package List: 1 x Bicycle Inner Tube Note: 1. Confirm whether the specifications of the inner tube are consistent with the outer tube. Each inner tube is equipped with a valve, a nut and a rubber cap that can withstand the load. When installing the inner tube into the outer tire, please carefully check the inner space of the outer tire for sand, cracks or other unfavorable factors.2. When installing the outer tires and inner tubes on the steel rims, please check the steel rims in detail to make sure that there are no bad factors on the steel rims, no deformation, bending, or debris. Please use lining tape to cover loose and rough banner heads or other sharp surfaces that will damage the inner and outer tires. 3. After the inner and outer tires are installed on the rim, inflate the inner tube with 10 PSI, then stop pumping, and check whether the inner and outer tires are correctly locked on the rim. Then it can be inflated according to the air pressure recommended by the manufacturer, marked on the sidewall of the tire. The rim line on the tire must be exposed outside the steel ring to be visible. 4. Don't pump up too full or too little, as this will cause the valve to separate from the inner tube and cause an accident. Please check whether the air pressure is at a normal level. Please check the valve to prevent air leakage and lock the valve core tightly.