... very small, so the axial heat conductivity is very high,while the radial heat conductivity is general. 2> Good Isothermal Performance ... absorb or release a lot heat, therefore, heat pipe can transfer much heat under isothermal circumstances theoretically, whose outside behavior ... 12pcs/ctn,15pcs/ctn ,24pcs/ctn 2.can packed according to your requirements.Not:you can put your logo picture in the carton ...