3M P3 R D3138 Secure Click Particulate Filter with Nuisance Level Organic Vapour and Acid Gas Relief and Ozone up to 10 x OELCode: 751786000 3M Secure Click Particulate Filter with Nuisance Level Organic Vapour and Acid Gas Relief, and Ozone up to 10 x OEL, P3 R, D3138 Size: 120. 0 x 105. 0 x 25. 0MM Each CE approved for environments containing particulates Hear it: Quick, simple cartridge connection. Simply align the connections and push until you hear a click. Use with CE approved 3M Secure Click Facepieces Feel it: Dual flow filters allow for easy breathing