These 5-piece packs of 710 thread coils are made of quartz and suitable for use with Lookah's Seahorse X, Swordfish, and Mini Unicorn vaporizers. The 710 Connect Quartz D coil can be used in the Lookah's Seahorse X, Swordfish, Mini Unicorn, Dragon Egg, and the Q7 Mini. Specs: 710 Quartz Coil Type A- Best Taste Type B- Best Vapor Production Type C- Wax Saving Type D-See Through Includes: 1 - 5 Pack 710 Quartz Connect Coils