A Twin Chuck dispenser for easy, controlled inflation. CNC machined aluminum dispenser with brass internals. Trigger Valve Operation for easy and controlled inflation. Twin Chuck head threads on to Presta and Schrader valves. Neoprene sleeve insulates hand from cold during discharge. Compatible with threaded CO2 cartridges, comes with one 16g cartridge. Specs COLORS: Black/High Polish Silver/High Polish WEIGHT: 26g