Pls notice the product is a 1:1 clone one,we supply it with good price,good quality.Features:*Three-post design *Slotted brass 510 center post *303 Stainless Steel *Single or Dual vortex airflow *Vortex airflow–airflow holes are drilled at an angle *Deep juice well *Alternate Top Caps available*Dimesion(L&D):17.5mm&22mm*Kit weight:55gKit contents:1pc Derringer RDA atomizer1pc allen wrench5pcs O-rings2pcs Replaceable coils3pcs Screws1pc Gift box