The Lookah 710 Replacement Quartz Coils come in four different styles. Type A is a quartz dish coil and this one is designed with flavor as the king. Type B is the dual hole quartz coil and this one was designed to give you the best vapor production. Type C is a square quartz coil that is designed to conserve your concentrates. Type D is a second dual hole quartz coil in a different style. These coils come individually or in a 5-Pack. They are compatible with the Seahorse X, the Swordfish, the Q7 Mini, the Dragon Egg, and the Unicorn Mini.