Wratten filter is a combination of two filters cut to size and calibrated; reusable, disposable; to detect particles in fuel samples
NSN 5910-01-135-1173
NSN 5895-01-528-7881
NSN 5905-00-987-4614
NSN 6650-01-483-0938
NSN 5998-00-661-0380
NSN 4140-01-042-5982
NSN 5905-00-119-4603
NSN 5998-00-552-6703
NSN 5910-01-159-7589
NSN 2925-01-252-8049
NSN 5965-00-045-7156
NSN 5905-01-403-2806