>Assuming Silicon tubing contains mostly Silicon, it actually >is a very good thermal conductor. Here are some thermal >conductivities to compare (in units of W/cm*C): >Silicon: 1.57 >Steel: 0.97 >Stainless Steel: 0.329 >Iron: 0.803 <snip> Err... I believe the tubing mentioned is silicone, with an 'e', an altogether different compound. Bob