The Innokin Endura T18 Coils 1.5 ohm (5 Pack) is a pack of five replacement coils for the Prism tank used in the Innokin Endura T18 & Innokin Endura T22 Vaping Kits. Just like the ones that come with the iSub Tanks, these replacement coils have the resistance of 1.5 ohm and include Japanese organic cotton