BULK RTA is designed by OUMIER Vape and Youtube reviewer VapnFagan. It is a perfectly designed rebuildable tank which offers a maximum of juice capacity 6.5ml. The postless deck provides an easy way for dual coils building. OUMIER BULK RTA also has a unique adjustable bottom airflow system, which will bring you huge cloud and excellent flavor without leakage. With the easy top refilling design, the Bulk RTA will bring you an excellent vapor flavor and vaping experience!