Lezyne Twin Speed Drive CO2Inflating your tires with CO2 cartridges is easier and more convenient that carrying around a hand pump. The Lezyne Twin Speed Drive CO2 Inflator Head allows you to effortlessly refill your tires with CO2 and works with both Presta and Schrader valves. The head is made from CNC-machined aluminum alloy and has brass internals for a durable construction. The Twin Speed Drive Inflator Head comes with a neoprene sleeve to protect your hand from the cold CO2 cartridges during inflation. Each head comes with a 16-gram or 25-gram CO2 cartridge and a neoprene sleeve. Features CNC machined aluminum dispenser with brass internals Slip-on valve operation Presta or Schrader valves Neoprene sleeve insulates hand from cold during discharge Weight: 16 grams (without cartridge) Includes one 16g or 25g cartridge | Lezyne | Twin Speed Drive Co2 | Black | Slip Fit, 16G Co2 Included