Hi, in the picture is a special copper tube with a very big surface on the inside and outside of the tube.
http://files.engineering.com/getfile.aspx?folder=7e1ba8ab-63bc-429f-843f-0e401308d0b7&file=DSC04301.JPG
Would you be so nice and tell me:
What is it used for(in which products)?
Where can...