The Portland Design Works Shiny Object CO2 Inflator with Leather Sleeve and Cartridge is constructed from a durable aluminum alloy. And considering that it's smaller in stature than a CO2 cartridge there's no reason to be stranded with a flat -- that is unless you forgot a tube. Hey things happen. But the Shiny Object's clever design makes it something that we carry almost solely to show off after situations of duress. The Object threads onto 16g CO2 cartridges and it features a control knob to regulate CO2 output. The operation is a breeze. Simply turn the knob clockwise to close the valve thread on your CO2 and then turn the knob counter-clockwise to inflate your tube. The inflator is compatible with both Presta and Schrader valve heads and to ensure that your hand doesn't freeze off PDW included a beautiful vegetable tanned leather sleeve. The combination of sleek alloy and stitched-leather creates a staple- with one foot rooted in the past and one placed firmly in the future. We know that you'll be glad to have it around. The Portland Design Works Shiny Object CO2 Inflator with Leather Sleeve and Cartridge is available in one size and one color. It's compatible with 16g threaded CO2 cartridges and both Presta and Schrader valve types. The Inflator includes a both a leather sleeve and a CO2 cartridge.