Wratten filter is a combination of two filters cut to size and calibrated; reusable, disposable; to detect particles in fuel samples
NSN 5895-00-627-9705
NSN 6685-01-513-2917
NSN 5935-01-469-7843
NSN 5965-00-587-1916
NSN 5930-01-146-4359
NSN 6240-01-213-1449
NSN 5855-00-189-6066
NSN 5975-01-535-0126
NSN 5835-01-383-1313
NSN 5990-00-201-1162
NSN 6220-01-382-2696
NSN 5975-01-550-7390