Plate Filter Pad - GF3 Medium
Medium (1-4 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.
Way to big. Not at all what I needed and did not come in any type of packaging thus it was dirty. Not very satisfied with this purchase.