This innovative 2-in-1 cycling CO2 dispenser and tubeless tire repair kit simultaneously inflates and seals tubeless tires Built from machined aluminum construction 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 release of CO2 gas 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 Sleek, compact design comfortably fits in your pocket or straps to your bike Includes two 20-gram CO2 cartridges and a simple Velcro strap Sealing performance may vary based on puncture size, tire size and tire pressure. TUBELESS CO2 BLASTER