The Micro Booster is an incredibly small, lightweight & easy to use CO2 inflator. Precision CNC machined from solid aluminum, the Micro Booster fits Schrader & Presta valves & its special design allows the user to adjust the flow while filling the tire. Accepts standard threaded CO2 cartridges. * Use only Topeak CO2 cartridges. Head Presta/ Schrader Push to Inflate Material CNC Aluminum Added Features 1 Threaded 16 g CO2 Cartridge Size (L x W x H)4.6 x 2.2 x 2.2 cm 1.8” x 0.9” x 0.9” Weight 15.5 g / 0.55 oz