3 x Continental inner tube in individual cardboard 18-25C 700 x 18/25-622/630 road sV: 28 valve Sclaverand-French valve or Rennradventil (Continental) - the vulcanized flexible tubes are always molded in metal for you and your mounting compatibility in order to improve and make it easy to install! Continental checks the air tightness of each tube before it leaves the factory. Examined before departure.