The Oumier x Vapn Fagan BULK 28mm RTA is the result of collaborative effort with Vapn Fagan, an esteemed YouTube vaping reviewer, implementing an expansive postless build deck, dual coil configuration, and can hold up to a whopping 6.5mL of today's popular eJuice within the expanded bubble glass tank. Constructed from durable stainless steel and glass reinforcement, the BULK 28mm RTA can withstand light to moderate falls and drops thanks to the borosilicate glass reinforcement. With a standard 3.5mL juice capacity, the Oumier Bulk can swap out the tank for an expanded 6.5mL bubble glass that hold plenty of eJuice within. A quarter turn threaded top fill system prevents any messy leaks or drips. The build deck is postless, featuring angled terminals at the base, top secured via hex screws, accepting larger and more exotic coil configurations within thanks to the large open terminals. Furthermore, the BULK RTA is designed to accomodate two internal coil structures to ensure better vaping and larger cloud production with each and every draw or drag through the 10mm long inlets of the adjustable bottom triple airflow control system that draws air in from the side and vents it directly beneath the coil structure.