There may be some confusion on how to tell SMOK replacement coils apart and how to know which coil variation is best for your overall setup since there are so many variables. First, there are a multitude of tank sizes. Second, there are multiple coil options that may have cross compatibility with other models. Then, lastly, there are some coils that are native to their specific tank only. SMOK’s coil language can be confusing, so we are going to go over the differences, so you all can feel more informed and comfortable to ask for the proper coils for your particular device.