528 Customs GOON 25mm RDA The 528 Customs GOON 25mm RDA is the updated rendition of the pioneer rebuildable dripper, implementing a spacious two-post build deck with clamp-style connection system, and a triple slotted dual airflow system. The GOON 25mm integrates a user-friendly two-post build deck properly top-secured via clamp-style fastening system. The clamp style connection can be used to fasten down even the largest of coil leads to create the best connection possible. A top cap with airflow ring provides precision airflow adjustments on the GOON 25 RDA. save the exact airflow settings. This airflow consists of two groups of three holes to inlet the preferred amount of airflow. The top cap and drip tip can be removed by unscrewing the top for precision dripping, without changing the airflow settings.