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