Plate Filter Pad - GF1 Coarse
Coarse (2-7 microns) filter pads for the K157 plate filter housing. For best results, filter sequentially--first with coarse, then with medium, and last with sterile. A pad is effective for 5-15 gallons.
I brew high gravity hopped beers. Used the course filter pad on several batches of beer that have been cold crashed for several days; filter clogs passing 2 gallons of brew every time. Opening the filter shows the pads are clogged but plenty of space between the plates.
These don't ship from NB in a sealed package, they ship loose in a bag. Be prepared to store them someplace clean. I've always used these pads though with no problems.