Superior quality Racor diesel filters with AQUABLOC multilevel filtration elements (99% of effectiveness in separating water from diesel).↵All filters are base-equipped with 30 micron cartridge.↵500FG with inlet UNF3/4"↵900FH with inlet UNF7/8"↵1000FH with inlet UNF7/8"↵↵Can replace Griffin GTB-S4 type filters.