Got my brass BF today! -Very unusual atty size- It is a 24.2mm diameter top cap. Strange, since the black one I got earlier was a "normal" 22mm thing. I picked up on a piece of brass to make a top cap, but it wont work, as it is too small for this atty. Oh well; Gotta get a piece of 1" round for this guy. Damn is this thing SOLID! Can't wait to vape this. Thanks dre- You 'DA MAN.