3M 7502 2097 P100 industrial work mask silicone welding smoke powder mask respirator fiberglass spray respirator dust fliters item included Option 1: mask 7502*1 piece (no inlet filter) option 2: Mask 7502*1 piece filter 2097*2/6/8/10 PCs filtration efficiency up to 99.97% effective medium-sized electrode (AEM) light, comfortable, breathable, convenient, pollution filter with oil and no it.™Half mask and full design, multi-size, multi-use, reduces inventory requirements and training needs.