1、It adopts butyl rubber material, the airtightness, temperature resistance and delay aging have greatly improved for longer service life. 2、With schrader air valve, it is no need to replace the valve core, which is convenient to use. 3、The butyl rubber tire inner tube can absorb the vibration of uneven roads to ensure the comfort of driving. 4、Easy to install, you can easily replace the old inner tube of the tire in a short time, saving time and efficient. 5、It widly fit 20 / 22 / 24 / 26 inch wheel, width between 1.75‑2.125inch tires, suitable for replace the inner tubes of road mountain bikes. Item Type: Bicycle Inner Tubes Material: Butyl Rubber Product Color: As Pictures Shown Product Weight: Approx. 236g / 8.3oz Valve Type: Schrader Valve Maximum Air Pressure: 8 Bar Standard Pressure: 20 1 x Bicycle Inner Tube Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store