P550274 Wire Mesh, Efficiency Beta 2:
150 micron
P551551 Cellulose, Efficiency Beta 2:
7 micron, Efficiency Beta 1000:
23 micron
P560693 Synthetic, Efficiency Beta 1000:
11 micron
P560694 Synthetic, Efficiency Beta 1000
23: micron
P564967 Synthetic, Efficiency Beta 1000:
5 micron
P565062 Synthetic, Water Absorbent, Efficiency Beta 2:
10 micron