3051 A1P3 R combined filter, in combination with half mask or mask respirator, protects the respiratory system against organic vapours and gases, the boiling point of which is higher than 65°C, and dusts, fumes and mists. The limit values for vapours and gases is 0.1% vol. and the concentration of dispersed phase of aerosol must not exceed 20 times the TLV value.

The most common substances, the 3051 A1P3 R combination filter offer protection against, are: ethyl acrylate, methyl acrylate, acrylonitrile, glutaraldehyde, acrylic acid amide, tetraethyl lead, tetramethyl lead, diphenyl, phenol, acetic acid, pesticides, dimethyl sulphate, cooking fumes, gasoline fumes, diesel exhaust and all other substances, the A1 canisters offer protection against.