3M™ Secure Click™ Hard Case Particulate Filter P3 R, D9035 (Box of 10 Pairs)3M Secure Click Hard Case Particulate Filter D9035, P3 R, is approved for use with 3M Secure Click Half Facepiece Reusable Respirator HF 800SD Series to provide protection against exposure to particles, dusts and oil water based mists in environments containing certain particles. Get effective respiratory protection against exposure to certain particles, dusts, and mists with 3M Secure Click Hard Case Particulate Filter P3 R D9035. This P3 R filter is