Replaceable dust mask 1191D-03 type - Dual type with RL2 filter media arranged on the left and right. Speech and support can be transmitted with a voice transmitter. The filter is an alpha ring filter that is made of ultra-thin glass fibers that are molded into a round pleated paper, enabling high collection efficiency and long-term use. By adding advanced processing technology to this alpha ring filter, we have expanded the filtration area to a maximum of about 12 times the bottom area, enabling even higher collection efficiency and longer use. Asbestos removal work level 3. Model Name Sakai 1191D-03 National Test Passed No. TM232 A high-performance dust mask classified as "RL2" with a particle collection efficiency of 95.0% or more. Respirator Koken 1191D, Koken Gas mask 1191D RL2, koken mask 1191D RL2, Masker Koken 1191R, Masker pernapasan koken