Vredestein inner tube in size 28 x 1.75 - 2.40, ETRTO 47/62-622. Equipped with a 50mm French/Sclaverand valve, box of 50 pieces. The main component of Vredestein inner tubes is butyl, a synthetic rubber with very low air permeability. This ensures the inner tube maintains the desired pressure for longer. Vredestein inner tubes are high-quality inner tubes produced according to the Unitube system, which means they are suitable for multiple outer tire sizes. Vredestein inner tube with high puncture resistance. Presta/French valve