How good are those attachable pipe vaporizers?

[MangaMan]

I've heard and read up on portable pipeable attacthed vaporizers. Is it too good to be true or does it live up to its name?

[MangaMan]

www.hugegrins.com Check it out...the mini vape

[PAGETURNER420]

Hi Jake how about this one

http://www.inavap.com/mainframe.php

$109 seems like a good price to me.:confused:

How do you tell the difference be conduction and convection?