Not sure tbh. Like I said last time I used a protank they were still measly Protank 2's with single coil heads!
http://www.discountvapers.com/kanger-protank-3-aerotank-t3d-evod-2-dual-coils-5-pack-2-0ohms/
The pics on that page suggest the longer stem is the now one?
http://www.discountvapers.com/kanger-protank-3-aerotank-t3d-evod-2-dual-coils-5-pack-2-0ohms/
The pics on that page suggest the longer stem is the now one?