The bike tubes are made of Butyl Rubber material, better air tightness, heat resistance and durable.
High quality Mountain Bike Inner Tubes with presta valves ( french valve)
Valve type: 60mm Presta Valve,Quality precision made valves.
Tube, 700 x 23C, presta valves 60MM. High air pressure retention.
Replacement inner tube for Children' , leisure bike, mountain bike, sport bike