Innokin Endura T18E Coils - 5 Pack The Innokin Endura T18E Coils come in a1.5 ohm resistance for the Prism T18E Tank used in the Endura T18E Vaping Kit and the T18 II Kit. Just like the ones that come with other Innokin Tanks, these replacement coils include Japanese organic cotton. They can be replaced in a matter of seconds and without a hassle. NOTE - These coils ONLY fit the T18E tank and not the T18 tank To achieve the best vapour clouds and taste of your favourite e liquid we suggest that coils should be replaced every 1 to 3 weeks, depending on the frequency of usage.