​Oumier Wasp Nano RTA is a 23mm diameter rebuildable tank which made of high-quality SS304. It mainly features easy single coil build deck and adjustable bottom airflow design, bringing optimal vaping flavour to users. Together with the 2ml e-liquid capacity, it offers ample juice storage to enjoy your puff too. So the Oumier Wasp Nano RTA is really an ideal atomizer for DIY fans.