1. SMALL AND COMPACT - fits easily into a saddle bag, jersey pocket or backpack. Weighing only 2 ounces / 58 grams each, you'll hardly notice you're carrying one while riding. An important thing to remember when using a CO2 inflator is that it is only a home remedy for punctures. Over time, the CO2 gas dissipates through the inner tube, and when you get home, you need to re-inflate the tire with air from the pump. So if you're traveling or packing a bike, one of our mini bike pumps is a great option. 2. Great for road and mountain bike tires - 700C road bikes can hit 120psi, 26" 1.95 mountain tires can hit 40psi. Note: Carbon dioxide gas is "not" food grade. As this cartridge dispenses air, it cools down quickly and gets cold. Care should be taken to protect your hands when dispensing air. IMPORTANT: For safety reasons - do not screw in and store CO2 cartridges in the inflator head until operation is required. Caution should be exercised when using carbon dioxide gas.