MixMaster29

i have a friend who makes e cig devices and is in search for a new juice company, i happen to make juice, at a typical 50/50 blend, but he would like to use my liquid in his disposables, im just curious to what type of blend i should use? i was thinking higher pg since its like a carto, but after taking it a part im not sure, its similar to a 510 DCT replacement filter, so im thinking my 50/50 blend should work just fine, but i wanted some expert opinion. what do you think fellow mixologists?