Employing two long wicks, one for each coil head, the IClear 16 Coil is going to help produce great vapor production for consistent flow. It is a good idea to have spare coils as after a while they may become woren out and as they get older the flavor and amount of vapor will reduce. Depending on how often you use your device, coils need to be changed every few weeks. It would be smart to invest in spare or replacement coils so they are there for you whenever necessary. If you are looking for durable replacement coils, then look no further than IClear 16 Coil by Innokin. At a affordable price, why not pick up some today!