Fast & Easy, 160 PSI / 11 BAR, for Presta & Schrader Valves Brand: ROCKBROS Material: CNC Aluminum Alloy + Foam Sleeve Weight: Approximately 80g (including package) Size: 6.1 * 3.5 * 3cm Note: CO2 cartridges are not included in the package. With Barometer Unlike other common CO2 inflators on the market, the ROCKBROS CO2 bicycle tire inflator is equipped with a 160 - PSI pressure gauge. This allows you to more intuitively read the pressure of your bicycle tire. It means you can measure the pressure at any time to avoid over - inflation. It's truly a safe design for riders. Fast Inflation and Rotary Control With the CNC - milled aluminum operation knob of the tire inflator, you can perfectly control the amount of CO2 released into the bicycle tires. The inflation process can be stopped at any time. The tire can be quickly inflated in just a few seconds while riding, which is fast and convenient. Avoid the hassle of changing a flat tire on the road. Portable, Compact, and Lightweight The weight of the tire pressure gauge is only about 80 g (including in the package), and its compact small size (2.4 x 1.4 x 1.2 inches) fits easily into a saddle bag, jersey pocket, or backpack. For cyclists who want to travel light, the ROCKBROS CO2 inflator is a great choice as a lightweight, compact on - the - go inflator. The mini - housing of the bicycle tire pump doesn't add extra weight to your ride. Fits Presta & Schrader Valves The CO2 inflator head is suitable for both Presta and Schrader valves. It comes with a Presta nozzle that can be installed when switching to Schrader valves and is easy to use. Well - designed and manufactured, it is more durable and leak - free. Quickly inflate the tires of your mountain bike, road bike, or mini - bike. Perfect Fit for All Threaded CO2 Cartridges This inflator head is designed for every size of threaded CO2 cartridges (12 g, 16 g, 20 g, and 25 g). An insulating sleeve (only for 16 g cartridges) is included in the package. Note: Once the CO2 is released, the cartridge will close. The head and the inflation head will become extremely cold. Therefore, please use the insulating sleeve to protect your hands. Do not touch the CO2 cartridges directly as it may cause frostbite on your hands. Do not throw the CO2 cartridges around. CO2 cartridges are not included in the package. Installation Steps Step 1: Put the insulating sleeves on the CO2 inflator. Step 2: Pull the inflator firmly until the metal needle pierces the cartridge. Step 3: Attach the filling head to the tire valve to prevent leakage. Step 4: Turn the cartridge half a circle and start inflating.