From what Amy says, it the 1/2" ID, 3/4"OD 1/8"wall Silicon tubing listed under rubber tubing. It's actually cheaper at Danger Den than McMaster (assumin Danger Den buys it in the full 50ft coils). I won't be going 50 below, but very pliable sounds very good to me, and $2.50x7 is much cheaper than $250x1 for a CPU

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Thanks everybody