Are you tired of building complex coils? ThenDemon Killer 8 in 1 Coil Kitwill be your right choice. It includes Hive Coil, Quad Coil, Tiger Coil, Clapton Coil, Mix Twisted Coil, Flat Twisted Coil, Fused Clapton Coil and Alien Clapton Coil. 6pcs each type with 48pcs in total. It also comes with a Allen Key. Get them as spare part for your RBA tanks.