Found this RDA to have fantastic flavor when using dual coils. Single coils when centered are too far from the airholes resulting in a substantial loss in flavor. Extremely well constructed with a 6mm juice well, can accommodate Goon-style tips has a smooth airflow. Does not heat up and airflow adjustments work like a breeze. Only cons i have is that it takes a little longer to build on than the majority atomizers, no tools are included and that the centre airhole could have been totally cut out of the design to make place for a BF pin ........ wow .... it would make this a awesome squonk atty. :) Overall extremely happy with my purchase. PRODUCT DESCRIPTION OD 24mm 303/304 Stainless Steel construction Cross Post design for center coil construction Gold plated brass contact 2.5mm open post holes Adjustable bottom airflow (with bottom airflow seal cap) Adjustable side airflow 6.0mm deep juice wells Wide Bore Drip Tip (Delrin) JAW Cap 2.0 (Delrin) 28.0mm overall height WHAT’S IN THE BOX? Tokugawa RDA Delrin Wide Bore Drip Tip (Pre-Fitted) 4 x Spare Screws (Flat head) Bottom Airflow Seal Cap Delrin Jaw/Chuff Cap Authenticity Card Spare O-Rings (5x larger yellows & 1x thicker black)