3M 6038 P3R (nuisance level organic vapour and acid gas and hydrogen flouride). Encapsulated Particulate Filters. Ideal for wet conditions, Hazard is contained within filter media, protected by plastic case avoiding risk of skin contamination on removal of filter. Easy clean surface Standard: EN143 Approval: CE marked Maximum use concentration When used with half masks: 20xWEL, Hydrogen Flouride: 10xWEL When used with Full face masks: 40xWEL, Hydrogen Flouride up to 30 ppm Below WEL for gases and vapours *Workplace Exposure Limit 1 BOX = 20 FILTERS (NOT PAIRS)