Offering the highest classification of respiratory protection, these filters achieve 99.98% filtration at 0.3 microns. constructed with high-efficiency synthetic materials, they are lightweight and comfortable to use for long periods. Features and Benefits Offer maximum protection against a wide range of dust particles Small and lightweight to give added comfort water-resistant for useability in a wide range of settings Smaller, thinner, flexible design allows the filter to be easy interchanged Typical Applications Dust Metal fumes Oil mist Water mist Micro-organisms Standards EN143 Notes Replacement filter for the SPR299, SPR501, SPR406, and SPR407 respirators