PORTLAND DESIGN WORKS CO2 INFLATOR HEADPERFECTLY INFLATEDGetting a flat sucks. Getting a flat and not being able to change your tube really sucks. You should always carry a tube, tire levers, and pump with you while you're riding. The Portland Design Works CO2 Inflator Head is made from aluminum and fits both Presta and Schrader valves. It has a control knob so you can easily regulate how fast the CO2 is released. It comes as both an inflator only or an inflator with a CO2 cartridge and vegetable tanned leather sleeve. Features Alloy construction makes it durable and lightweight Control knob regulates how fast the CO2 is released Available in either an inflator or with a 16g cartridge and sleeve | Portland Design Works | Co2 Inflator Head | Silver | W/ 16G C02 Cartridge And Sleeve