References: <200210160846.g9G8k9Nf018487 at mailhub_actwin.com>
There is a tube called Norprene that I use. It is stiffer than silicone. Clippard Instrument Labs makes a urethane tubing, available in colors, that is much stiffer and tougher.
Bill Davies
WEDavies at nni_com.