Never have to wrap yourself again: Includes 8 different prebuilt coil types for each evaporator to try new windings: ribbon twist, mixed twisted coils, quad coils, hive coils, fused clapton coils, tank track coils, tiger coils, and clapton coils. High-quality workmanship – Material: iron chrome aluminum alloy, melting temperature: 1400°C / 2550°F, inner diameter 3mm, durable and lightweight. Practical storage box: Plastic box keeps each size separate and organized. With the plastic box, you can manage up to 120 pieces or store your other coils together, very convenient to carry with you. A must for every vaper: This coil kit is great for any vaper, self-winder, who is too busy to wrap coils, or the beginner who does not know how to do it. This versatile set is very helpful. Easy to use: Very easy to install, the performance is good and comparable to other ready-made coils, the best prepared coils for your RDA and RTA!