The Ultraflate Plus valve system features a front position trigger to actuate the reliable valve system built into the head. A brass outlet is installed & fits Schrader & Presta Tire valves. Various outlets are available that replace or supplement the stock outlet. A safety lock on the rear of the UF head prevents accidental discharge. The CO2 inflator uses our Patented 12g or 16g Cylinder Multi Cup Cartridge Holder. Features a safety lock on the rear of the UF head to prevent accidental discharge.