Spherical shape of iem 18 degrees r
NSN 5950-00-296-1357
NSN 5925-01-361-0965
NSN 6220-01-306-4307
NSN 6645-01-629-6343
NSN 5998-00-143-4723
NSN 6645-01-211-2111
NSN 2925-00-422-5159
NSN 5996-01-068-4761
NSN 6105-01-037-9577
NSN 5950-01-401-5321
NSN 5905-00-056-2194
NSN 5990-00-883-6364