100% ozone friendly Pure compressed gas Zero reside Pure compressed air for cleaning delicate or inaccessible areas. Use in delicate instruments and computer equipment. This product innovative range of environment friendly products, it adopt nicety electron cleaning technology. Ideal for cleaning computer keyboards , optical instrument, removing microscopic dust, printers, timing devices, cash machines, fax machines, photo equipment, VCRs , CDs ,PCBs and delicate lab equipment. Note: All Air dusters should be used in short, sharp blasts.