If you have been vaping for a while and are considering building your own coils, this is the RTA head for you. The Aspire Cleito is a Rebuildable Tank Atomizer that fits the Aspire Cleito tank. If you want to build your own coils, but don't want to carry around a bottle of vape juice and a bulky RDA, this is the answer. With the Aspire Cleito RTA Head, you build the coils and install them on the deck. You then feed your wicking material through the coils and assemble the Atomizer. It attaches to your tank just like the pre-built coils that you buy in the store. This allows you to build and customize your coils to produce more vapor, more flavor, or a perfect combination of the two for the most personalized vaping experience without having to sacrifice any convenience. When you order this product, it comes with two pre-installed Clapton coils, an Allen wrench, a bag of cotton, 5 extra O-rings, and 8 extra grub screws. Everything that you need to start wrapping and wicking your own coils!