The Lezyne Trigger Drive is a CNC-machined aluminum CO2 inflator for fast, controlled roadside and trailside fills. A trigger valve lets you meter the gas in short bursts instead of dumping the whole cartridge, and the Smart Thread head works on both Presta and Schrader valves. A neoprene sleeve keeps your hand off the frozen cartridge, and a 16g threaded cartridge comes in the box.Key Features CNC-machined aluminum construction Trigger valve for easy, controlled inflation Smart Thread head fits Presta and Schrader valves Neoprene sleeve insulates hands from the cold Includes 1 x; 16g threaded CO2 cartridge Compatible with threaded CO2 cartridges only Specs Finish: Gloss Silver Weight: 82 g Dimensions: 106 x; 53.5 x; 22 mm