The ES1020R is a Duster System, high pressure duster that cleans electronics without scratching delicate surfaces. This duster/cleaner is non-flammable, residue-free and won't scratch delicate surfaces. Reusable system of chrome trigger and refill can. High pressure for contamination control, which has no ozone depleting compounds. It appears in the form of clear colorless liquefied gas with slight ethereal odor. The Ultrajet® is generally compatible with most materials used in printed circuit board fabrication, including sensitive plastics and compounds. As with any duster/cleaner, compatibility must be determined on a non-critical area prior to use.