The stage 3 dual media, fine filtration set comes with fine glass microfiber filters (thick) and the support backing cellulose filter (thin) total count is 500 of each type of material. Add both papers together to form your <0.9 micron. 7×7.25 inch papers fit exclusively in Summit PIGs.
500 Units < 0.5 micron
500 Units 20-25 micron
Rejection of all compounds @ < 0.9 micron