Dakine R.A.S. Removable Refillable Empty CylinderWhen you're venturing into the backcountry, add the Removable Airbag 3. 0 system from Mammutto any of our Poacher R. A. S. styles for added safety. Certified for use in North America, this compressed air cylinder is refillable at certified locations across the globe. THIS UNIT MUST BE PAIRED WITH RAS REMOVABLE AIRBAG 3. 0 (SOLD SEPARATELY) CYLINDERS SHIP EMPTY AND MUST BE FILLED PRIOR TO USE 3000 psi refillable compressed air Pressure gauge for safety