fiber inner sleeve

[fsck]

I'm seeking a {brand} name for the protective sock that goes inside polyethylene fiber duct. It's a woven hollow tube; you pull in say 6 of them, then the fiber is pulled down the middle of each sock. This not only protects fiber from abrasion but also tangles with adjacent fiber bundles.

I can picture it, but my Googlefu is weak, and I can't find a noun, brand name or supplier.

 

[zappedagain]

fsk,

Did you ever have any luck with this? It sounds interesting.

Thanks,

John D