Falcon Dust-Off Aerosol Compressed Gas (152A) Disposable Cleaning Duster, 2 Pack, 3.5 Oz The Duster 100% Ozone Safe An original bitterant can be added to the compressed gas to discourage cardiac arrest from the versatile tool compact essential for places where space is tight same jet power as efficient larger models 100% safe added ozone bitterant to help discourage heart disease essential for places where space is tight same power squirting efficient bigger models