Hybrid open ring, 180 mm
NSN 4140-00-045-8117
NSN 5835-01-432-1277
NSN 7035-01-253-9271
NSN 7035-01-550-8668
NSN 6620-00-456-9539
NSN 5950-01-403-2852
NSN 6645-01-340-7354
NSN 6685-00-248-6990
NSN 6645-00-401-5563
NSN 5945-01-113-6828
NSN 6220-01-420-1856
NSN 6145-01-482-1340