Lezyne Twin Speed Drive CO2. CNC machined aluminum dispenser with brass internals with a Twin Slip-Fit head that presses onto Presta or Schrader valves. Included neoprene sleeve insulates hand from cold during discharge. Compatible with threaded CO2 cartridges. TECH SPECS table{border-collapse:collapse;width:100%;} td{text-align:left;padding:8px;font-weight:350;} tr:nth-child(even){background-color:#f2f2f2} th{background-color:#eb212e;color:white;text-align:left;padding:8px;} .desc .specs-heading{font-size:24px;font-weight:600;padding-top:35px;border-top:3px solid #f0f0f0;display:inline-block;border-bottom:4px solid #eb212e;width:142px;margin:0;} Cartridge Type Threaded Included Cartridge Yes Defined Color Black Description Type Inflator Included Cartridge Count 1X16g Color Black