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This PERRIN foam filter/diffuser for the bottom of an air-oil separator (AOS) is a 48 ppi red foam disc measuring 2.5 inches by 0.825 inches with a central hole. It functions as the bottom filter element or diffuser within the AOS assembly, supplying the specified foam media and size needed for proper separator operation where that replacement disc is required.
PERRIN Foam Filter / Diffuser for AOS Bottom - 48ppi Red 2.5in x 0.825in Disc w/ Hole
