Michelin Bicycle Tubes Airstop A1 Butyl 28" 700x18-25 Presta Valve 40mm Bike Tube - Value Bundle 5-in-1 Bicycle Tube 700c Wheel Size: 700x18/25 (622), Valve: Presta (40mm) All purpose inner tube and excellent replacement inner tube for your road bike Material: Butyl tubes with renowned Michelin quality Durability: Each and every inner tube passes a stringent 100% quality control inspection Design: Seamless construction, with a mould-cured vulcanisation, to ensure uniform roundness and give a smooth ride and handling