Stage 1 – 1000pcs of 20u chemical duty paper. Stage 2 – 1000pcs of 8u chemical duty paper. Stage 3 – 500pcs of sub 1u chemical duty 100% borosilicate paper (no chemical binder grade AE). These circular papers have a 142mm diameter (5.6 inch). All papers made in USA with no questionable composition, and no import junk. Straight up, best high flow papers you’ll ever use.

  • Comes with steps 1, 2 & 3 Hochstrom Filter™ high flow paper