I believe you're right, we use Cole Parmer Masterflex Platinum tubing at work on our peristaltic pumps, and it seems softer and slightly more translucent than the tubing I've seen is sold online at the major homebrew stores. YMMV though. On a side note, anyone know a good way to get rid of stains on tubing? After running a stout though my tubing recently it seems to be darker in color
These stains are permanent. I tried to flow fairly strong caustic through the lines at one point to try to abate this staining without luck. If caustic won't fix it, not much else will...