The iS Coupe Cage bottle cage is a top access model that can be mounted anywhere on the bike. The 10-function multi-tool is securely housed behind the canister, and features a special finish providing greater corrosion resistance. The tool itself offers 10 functions to help you manage basic trail incidents. The CO2 Unit is our Boundary CO2 inflation system that provides a quick and efficient method of reinflating your tire in an emergency. The valve is protected to prevent accidental manipulation and our design allows you to easily control the flow and flow of CO2. The set includes a 16g cartridge.