Wratten filter is a combination of two filters cut to size and calibrated; reusable, disposable; to detect particles in fuel samples
NSN 2925-01-521-0600
NSN 6645-00-641-3202
NSN 6150-01-646-5657
NSN 5835-00-227-7909
NSN 5905-01-367-9808
NSN 5950-01-447-5990
NSN 5910-01-237-2621
NSN 5990-01-212-2037
NSN 6130-01-528-0113
NSN 7035-01-633-9537
NSN 4140-00-215-8593
NSN 6105-01-375-9993