From Chevron

This  revolutionary flexible tungsten is easier to fix in place and tie over.

The rubbery surface is far less slippery than metal so thread turns stay put.

...Takes resin, glue and varnish well

...Is slightly elastic so holes and slots for hooks can be smaller, the fit is tighter and neater

 Weight around 1.3g. Can easily be cut to size to adjust weight or length

5 tubes per pack

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