Manufacturer: 3M Size: Sold per pair EN Standard: 143 Colours: White Description: 3M 5935 P3R Particulate filters for use with 3M Gas and Vapour Filters. Use in combination with 3M 6000 Series Gas and Vapour Filters with a 3M 501 Filter Retainer for combined gas/vapour and particulate protection. Maximum use concentration: 40xWEL* *Workplace Exposure Limit.