Material:stainless steel 316L

Respirator size: 45*128(small) 20um

                            64*180 (large) 20um

nomal filter rating(um):2,5,10,20,40
control layer(mesh):325*2400 200*1400 165*1400 165*800 50*250
permeability(%):38
bubble point pressure:280-640(2um) 250-600(5um) 220-550(10um) 180-450(20um) 150-400(40um)
thickness(mm):1.7