The IJOY RDTA 5S is the sixth generation model in the RDTA line and implements an innovative Central Fill design, two post gold-plated build deck, dual adjustable airflow system, and a push and lock body section which protects the glass and makes wicking easier. To fill the RDTA 5S simply remove the top cap and fill liquid down or go straight through the wide bore ultem drip tip without remove the top cap. The bottom and side airflow system can be used independently or in conjunction with the bottom airflow for maximum air intake. Innovative airflow, and ease of building, the IJOY RDTA 5S is an excellent option for users looking for a high performance atomizer.