Wratten filter is a combination of two filters cut to size and calibrated; reusable, disposable; to detect particles in fuel samples
NSN 6650-01-534-5787
NSN 5855-00-879-5849
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NSN 6645-01-575-4181
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NSN 6650-01-074-2620
NSN 5935-00-760-7240
NSN 5965-00-281-0319
NSN 5935-01-167-7790
NSN 2925-01-564-8043
NSN 5935-00-812-7777
NSN 5998-00-132-5183