Hybrid open ring, 180 mm
NSN 5990-01-510-4699
NSN 6610-01-364-0294
NSN 6150-00-134-4833
NSN 5905-00-691-2218
NSN 6620-01-562-8816
NSN 5895-00-027-8382
NSN 5915-01-420-1327
NSN 5905-00-628-7047
NSN 5965-01-247-5696
NSN 5975-01-106-2238
NSN 6645-01-366-5033
NSN 6150-01-215-7951