Details Protect against organic vapours with boiling points above 65°C 3M™ Bayonet Connection: Flexible system for connection to 3M half and full facepiece Lightweight with low breathing resistance Designed to optimise your field of vision 3M™ A1 Gas and Vapour Filters 6051 protect against organic vapours with boiling points above 65°C. Suitable for use with 3M™ Reusable Respirators featuring the Bayonet filter connection system: 3M™ Reusable Full Facepiece 6000 Series, 3M™ Reusable Half Facepiece 7500 Series, 3M™ Reusable Half Facepiece 6500 QL Series and 3M™ Reusable Halfpiece 6000 Series.