"1.Seamless 303 Stainless Steel Material. 2.Air-Flow Control with 3 slot holes each side. 3.Easy to clean and change the heating coil 4.Active and functional Heat sink Top Cap allows heat generated from the coils to escape with ease, yielding a cooler vaping experience. 5.Less resistance for electrical current to pass through. 6.510 ego thread, compatible with 510 ego battery and drip tip. 7.Resistance can be customized as your demand. 8.100% no leakage 9.Suitable for all kinds of Vapers. http://www.waideacig.com/"