Replacement Innokin T18E Prism tank organic cotton coils 1.5Ω Ohm. NOT COMPATIBLE WITH THE T18 TANK. The Innokin Endura T18E 1.5 Ohm coil is a replacement for the Innokin Prism tank used in the Endura T18E Starter Kit. These coils have 3 holes running from the top to the bottom of the coil. Price is per coil.