High-pressure duster (has the BIGGEST blast of any non-CO2 duster) is non-flammable, residue-free and won't scratch delicate surfaces. It contains 100% 1, 1, 2-tetrafluoroethane (HFC134a) and is compatible with most materials including sensitive plastics and compounds. 10 oz. can. Classified as Hazardous Material by US Department of Transport so shipping restrictions may apply.