520ml Can/200ml Fill, upright and multi-positional (invertible) air duster, Ideal for removing stubborn dirt dust and debris from difficult to reach areas such as printers keyboards and other electrical equipment, HFC Free and Ozone friendly. The Fellowes Performance HFC Free Invertible Air Duster 520ml Can/200ml Fill is to be used as an upright and multi-positional (invertible) Air Duster which is ideal for removing stubborn dirt, dust and debris from difficult to reach areas such as printers, keyboards and other electrical equipment. The Fellowes Performance HFC Free Invertible Air Duster is 100% ozone friendly and HFC free.