PILAK HARI 3.5 / 30mm RDA (SILVER) 2JNT Philippines  Solid Silver with ultem tip   Improved Air Flow Control for better performance.  Specs and main feature:  98gm solid silver(92.5%) 510 soft silver fine tread Positive pin 3mm diameter tread w/1.2 protusion on the 510 - Pole thread :3mm - Modified w/stainless allen set for longer durability - Pole 6mm diameter Air flow control Includes 1x RDA1x Spares baggie Mechanical mods and rebuildable atomizers are for advanced users only - users with extensive knowledge on battery safety, coil builds, Ohm's Law and more.