Below from a google search; don't know if correct Angel Garcia, Long Valley, NJ:
"From what I can tell there isn't alot of difference between the tubesets other than the way they are produced.
For Columbus SL and SLX (Seamless):
The tubes are produced from a solid billet of steel pierced and drawn to the necessary dimensions.
Columbus Cromor (seamed):
Seamed tubes are produced by rolling sheet into a tube and welding it up. The resulting pipe is then drawn down and cold worked to its final dimensions; the seam is worked into the tube and becomes invisible to all except electron microscopes
I don't think there is a significant weight difference in the 2 tubesets."
> Can some one tell me what the heck Columbus Cromor tubing is? I am
uncertain
> of this is within the CR time line, but I went to the Columbus web site
and
> they no longer --as far as I can see--have any info on it. Was it seamed
tubing?
> Was it dubble butted? How much thicker than SL was it? Any help would be
most
> apprecaited.
> cheers-
> Dave Anderson
> Cut Bank MT