3-pack, triple layer filtration bags

FD-12.5L-3-NAD:
12.5 L/3.2 gal. for 600AL-18, 700AL-18, 600AL-22, 700AL-22

FD-22.5L-3-NAD:
22.5 L/5.8 gal. for 600AL-32, 355AL-32 AND 655AL-32.