The dual coil evaporator heads of Kanger are general. Very good. The smoke and evaporation is good, the taste also. However, the 1.5 ohm heads in my opinion, a manufacturing defect shows up after a few days of testing. The evaporator heads hold namely not very long (short below average). This is in my opinion the fact that the liquid inlet (the small holes on the side of the evaporator head) at the 1.5 ohm variant has fallen too large, which is a hole not round but too large (more oval and thus twice as size of a normal hole). Already after a few puffs on the e cigarette withdrawn from the glass fibers and hanging out of the hole. After a short time the head starts to siffen (gurgle) and no longer works. That related to the time out of the holes, the glass fibers is completely normal, but not after only a few trains and that fibers 5 mm - hanging out 1 cm seems to me a bit too much before. I guess at this point all the Kanger evaporator heads in 1.8 Ohm to order. These have normal, small holes that make up the fiber does not get quite as pressed. Evaporation and taste are identical, also the price. For keeping the 1.8 Ohm heads much longer and you look at saving a lot of anger. One can see the 1.8 Ohm heads slightly. These have on each side of the evaporator head (left and right) each 2 small inlet holes, both round and both the same size. The defective 1.5 Ohm heads have just one of these holes per side next to a kind of window (oval hole, twice the normal holes ... there then also depends on the fiber out). So, save trouble, buy 1.8 Ohm heads (the number Ohm's less relevant, it's all about that 1,8er variant has different holes and therefore works better). In this sense, good steam.
