The OSUB 40W mod stands 70 mm tall, is 35 mm wide and 22 mm thick. So it is 2.7 inches tall, 1.37 inches wide and .86 inches thick. Yes, it is that small and really is capable of 40 watts or 600 degrees F in temp control. The Helmet subohm tank is 50 mm tall and 22 mm in diameter. That is less than 2 inches tall and under an inch in diameter.

Once assembled and the tank is threaded into the 510 connection on the mod, it is about 4.5 inches tall. The OSUB mod weight 116 grams and the tank weighs 53.5 grams. It weighs less than 6 ounces. Filled with up to 2 ml of ejuice, it will come in right at about 6 ounces. It is very lightweight because the mod is constructed of a very strong but light zinc alloy. The tank is made of stainless steel.

A regular Zippo lighter is 2.24 inches tall so the OSUB mod really is about the same size. The OSUB is not as wide as a Zippo and is only slightly thicker. It really is amazing that a 40 watt mod with temp control could be made at these dimensions.

The Smok OSUB does weigh about twice what a Zippo does but obviously a lot more goes into the construction. This is a sophisticated device. If you have been looking for the smallest vape mod, this is the one that you have been waiting for. The best part is that it is made by Smok so you know that you are getting excellent quality from a company that is making many of the very best vape products in the world right now.

Like other new tank designs that are leak proof, the secret is the top airflow. The Helmet tank and coils draw in the air through the adjustable airflow setting at the top. The air is drawn down and through the coils before being drawn back out the top bringing a whole lot of vapor with it! The tank and coil design is brilliant. The top airflow design is similar to the TFV8 Clod Beast tank. 

The Smok OSUB vape mod looks fantastic. How can you not love that black and gold design! Of course, if you should prefer another color there are several to choose from. There is also a black and silver, a stainless steel finish, white and a cherry red. So there is lots to choose from.

You can see the list of technical specifications above. One other thing you will see in the images is the OLED screen. It is small but perfectly proportional and easily readable mounted on the side directly above the up and down buttons. To fire the mod, simple click the fire bar that runs the length of the mod, similar to the Smok H-Priv fire button design. 

--By Matt McConnell