Rail is part of a climbing protection system used on permanent type ladders, material is stainless steel type 316
NSN 6105-01-390-6386
NSN 6145-01-179-9551
NSN 5935-01-113-2298
NSN 6610-01-424-3213
NSN 6610-01-224-7247
NSN 6130-01-429-0880
NSN 5925-01-467-2668
NSN 2925-01-368-5773
NSN 5960-01-487-4791
NSN 7035-01-158-7673
NSN 5950-01-141-7019
NSN 5996-01-322-0021