The ‘E’ in the model number of these interchangeable Innokin Prism T18E atomizer coils shows that the coils are designed for use with Innokin’s TPD compliant Prism T18E Tanks. Innokin Prism coils feature a special convection airflow system. Incoming air is drawn through the wall of the coil where it is pre-heated by warmth from the atomizer coil. The warmer air is then able to absorb more e juice flavour. This produces an intense taste sensation from each vape. Each of these interchangeable T18E Prism coils features 12 individual e juice ports. The internal coil wire nestles in a deep padding of Japanese organic cotton. The cotton ensures long-lasting flavour purity. Designed for use with the TPD-compliant Innokin Endura T18E Tank only. Pack of 5 Coils. Available in 1.5ohm and 2.0ohm resistance.