Absolutely amazing tank carto! Im giving them 5* because of how well they work and that they have alot of different options depending on voltage output, and pg/vg ratio. This is how to order... regular 3.7 vold battery u want to order a single coil. Mod v.v. battery, dual coil. The lower the ohm, the warmer the t.h. and lessens the life span of battery and carto. The higher ohm, longer span and t.h. is still great in my opion. Pg 100%or 1 hole, no more. 70/30 ratio, 2 hole. 100% vg 3and hole
Reviewed by: Kevin Green from Portage,IN.