On some of the better fishing lanyards, the section that goes around your neck has these small diameter black EVA tubes strung onto the cord. They seem to be about 1 1/2" long or so, maybre 1/2" to 9/16" in diameter, with a hole inside large enough to run a shoestring through. Does anyone know where these can be purchased? Thanks.

You need to look for a tubing supply company - yes, such places do exist. I know that not too far from me is a company that sells tubing, all types and kinds. When I needed chartruece surgical tubing, they had it.

Check your local yellow pages and see what turns up. You may have it available not too far away from you.

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MudHole has tubing in several sizes (latex) - or you can try a local hobby shop that deals in gasoline model automobiles and airplanes and use the gas-line tubes (soft material not the clear hard tubing).