This innovative 2-in-1 cycling CO2 dispenser and tubeless tire repair kit simultaneously inflates and seals tubeless tires. This is the perfect addition to your road, gravel, or mountain bike flat kit. It's built with a machined aluminum construction, which is both lightweight and highly durable. A hardened steel reamer scours the hole, inserts the plug, and inflates the tire for an efficient and rapid repair. A CNC-machined twist knob manually controls the release of CO2 gas. The aluminum canister holds the five included tire plugs and safely stores the reamer when not in use. High quality tire plugs aggressively seal holes that are too large to be sealed by sealant alone (hole size varies from tire to tire). A sleek, compact design comfortably fits in your pocket or straps to your bike. Two kit options available: Two 20-gram CO2 cartridges OR no cartridge and a simple Velcro strap. Note: Sealing performance may vary based on puncture size, tire size, sealant quality and quantity, and tire pressure