Moldex EasyLockreg; Filters for Series 7000 amp; 9000 masks. No need for additional clips or holders. Different gas and particulate filters can be combined. EasyLockreg; particulate filters can either be connected to the EasyLockreg; gas cartridge or directly to the mask body. Adaptors or particulate pre-filters are not necessary. P3 R D for protection against harmful and toxic dusts, fumes and aerosols based on water and oil. 20 x Workplace Exposure Limit (Half Mask).40 x Workplace Exposure Limit (Full Face Mask). Tested and certified to EN 143:2000#43;A1:2006.