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Joe, These three pictures are of a piece of loom. Remember this stuff? (LOL)
Caper

Yes, and it is still available!

TUBING, FLEXIBLE NONMETALLIC(YCTR)

These listings include woven flexible nonmetallic tubing (fiber loom) in
trade sizes 7/32 to 2-1/2 in. incl. for installation as mechanical protection
in accordance with Articles 320 and 324 of the 1999 National Electrical Code.

The basic standard used to investigate products in this category is UL3,
Flexible Nonmetallic Tubing.

Joe

Joe Tedesco, NEC Consultant