These gas and vapour filters fit directly onto the 3M 7502 and 7503 half mask respirators, (and 6000 series full face respirators). These filters provide protection against a variety of gases and vapours. They combine protection with comfort and balance without interfering with your field of vision. They are lightweight with low breathing resistance. The bayonet-style connection gives a secure twist and click easy fit. For additional protection they can be used in combination with 5925 or 5935 dust filters and retainers. 6051 Organic vapours; EN14387:2004 A1 protection level. 6055 Organic vapours: EN14387:2004 A2 protection level. 6059 Organic vapours, in-organic gases, acid gases and ammonia. EN 141:2000 ABEK1 protection level. Please note the information is for guidance purposes only. A proper risk assessment by qualified personnel should be carried out before selecting an appropriate filter cartridge.