Suitable for Series 7000 and 9000 Masks bayonet connector. Particulate filters can either be connected with the gas cartridges or directly with the mask body. Adaptors and particular pre-filters are not necessary. Simpler Logistics - 30% less parts. Particulate filters with pleated Filter Technology: significantly reduces breathing resistance, improves wearer comfort & reduces fatigue. Particulate filters tested and certified to EN 143:2000+A1:2006. Gas filters and pre-assembled filters tested and certified to EN 14387:2004+A1:2008