CleanDr 30103 00 AirBlaster CO2 Actuator Pure anti-static CO2 gas dilivers higher velocity airflow than canned air Compact housing with easy to replace 16 gram air cartridges Completely environmentally safe (no CFCs, HFCs) and nonflammable Patented actuator variably controls airflow for the right amount of cleaning pressure Oil-free for use on delicate items such as photographic negatives and electronic equipment