Filter P2 R 5925The P2 R filter is designed to protect against low levels of airborne particles, including fine dust and water/oil-based mists. It is compatible with all 3M half and full-face masks with a bayonet connection.Filter class – P2 RFilter type – for solid particlesAdditional Information3M™ particulate prefilters with bayonet fitting can be attached to 3M™ 6000 series gas and vapor filters to provide protection from specific solid and liquid particles when used with 3M™ reusable respirators with bayonet connection. Use the 3M™ 501 filter retainer to attach one prefilter to each gas/vapor filter.