DETAILS BIG AIR. EASILY! If you're a tubeless tire convert, you'll wonder how you lived without this pump. Just pressurize the chamber and with a simple flip of the burly switch, all that air floods the tire, giving it no option but to seal and air up. Once the tire's in place, flip the switch back to bypass the chamber and you can top it up accurately with the giant gauge. SPECS Product Weight 3150 grams Manual(s) bbn-chamber-tubeless-floor-pum