The Genuine Innovations Ultraflate Plus Tire Infaltor is compatible with non-threaded 20 gram CO2 cartridges and threaded 16 gram, 20 gram and 25 gram CO2 cartridges. This best-selling CO2 bicycle tire inflator features a trigger lock that prevents accidental activation, and a comfort grip to protect your hands from the cold CO2 cartridge. Compatible with Presta and Schrader valves: push-on for Presta, screw-on for Schrader. This is an easy-to-use inflator: simply drop the CO2 cartridge into the cup, screw on the head, attach to valve, unlock the safety latch, attach to the valve stem, and pull the trigger to release air. So quick and easy, you’ll be back to riding your bike in no time. Works great for motor sport applications. Includes trigger controlled technology; one 20 gram non-threaded CO2 cartridge; and a Limited Lifetime Warranty.