It comes with 5 swappable air flow resisters(1.0mm, 1.6mm, 2.0mm, 2.5mm, 3.5mm).
4 extra air flow resisters are optional (1.2mm,1.4mm,1mm X 2, 0.8mm X3)
Bigger posts to reduce the size of chamber.  New and easy refilling system.
Two 510 drip tips(airhole dia.: 3.5mm & 2.0mm).
Food grade 304 stainless steel.
3.5ml capacity.

WIDTH: 24 mm / 0.94 in
HEIGHT: 43 mm / 1.69 in (without drip tip)