butyl bike tube 1.A/V, E/V, F/V, G/V, I/V TR4 valves 2. ... service 3.ISO&CCC 4.delivery date :25 days butyl bike tube we take this opportunity to introduce ourselves that we ... have natural rubber tubes and butyl tube with A/V, E/V, F/V, I/V, G/V, TR4 valves etc ...