Spherical shape of iem 18 degrees r
NSN 5945-01-061-5209
NSN 6610-00-131-2533
NSN 2925-00-474-4990
NSN 5935-01-500-3915
NSN 6135-01-633-8502
NSN 5985-01-414-2621
NSN 6620-00-844-2494
NSN 5990-01-221-6361
NSN 5915-01-330-3550
NSN 6610-01-037-4392
NSN 6650-00-078-5773
NSN 5915-00-376-2121