Rail is part of a climbing protection system used on permanent type ladders, material is stainless steel type 316
NSN 5915-01-578-6153
NSN 5835-00-005-2311
NSN 6130-00-842-3813
NSN 6685-00-936-5029
NSN 5990-01-492-9887
NSN 6620-01-288-8249
NSN 6240-01-326-1244
NSN 6105-00-492-6159
NSN 7035-00-631-3782
NSN 6110-01-322-2758
NSN 5960-00-204-7506
NSN 6685-01-577-6405