Found these really interesting little ecig heatsinks when searching for something entirely different……as you do.
They are really useful because they screw together, so you can stack say 3 (£9.99) or more. Useful for people without lathes that want to make effective heatsinks up.
Thought I’d post them as they may be of use to someone. 
Here is the link - HERE
The bottom one shows the other side, I couldn’t find the copper one (pic protected) You can remove that little screw in the middle, maybe put led wire through for triples?
