500 Pieces of sub 1u chemical duty 100% borosilicate paper (no chemical binder grade AE) that fit exclusively in our Hochstrom Filters. These circular papers have a 142mm diameter (5.6 inch). Made in USA. No questionable composition, and no import junk. Straight up, best high flow papers you’ll ever use.



Our other Hochstrom Filter™ stages:

Hochstrom Stage 1 Paper

Hochstrom Stage 2 Paper

Hochstrom Paper Package