SALT CO2 Cylinders for the SALT Self Defense Pepper Spray Gun Includes - 15 Crosman CO2 Cylinders, 1 protective case 21 shot capacity - Each SALT CO2 Cylinders can fire 21+ SALT Pepper Spray Rounds. That's over 100 shots total in each pack! On Demand - SALTs patented technology allows each CO2 cylinder to stay safely sealed until the permanent metal seal is punctured with the first pull of the trigger. Most reliable - SALT only uses Crosman CO2 Cylinders, one of the top manufacturer of air cylinders in the world. Quick reload - SALT CO2 Cylinders can be replaced in seconds, allowing you to quickly fire an unlimited amount of pepper spray rounds when you need them most.