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AirSmith CO2 cylinder is the best choice for bicycle tools. Aluminum alloy material with precision CNC machined for a lightweight and compact design. Lever type with good operation, super lightweight.Perfect companion for touring. Features: 1. Easy to use lever operation 2. Safety cover (case compatible and sponge type) 3. 2 in 1 valve design for Presta and American style 4. Lightweight and compact design 5. Luxurious silver and dark black color