Wratten filter is a combination of two filters cut to size and calibrated; reusable, disposable; to detect particles in fuel samples
NSN 5920-01-487-3700
NSN 6145-01-484-8735
NSN 5990-01-312-2638
NSN 5999-01-631-7023
NSN 5920-00-125-1316
NSN 4140-01-160-1742
NSN 6645-01-023-8020
NSN 5855-01-400-1590
NSN 6110-00-271-9928
NSN 5965-01-501-5638
NSN 5945-00-371-8371
NSN 6240-01-381-6815