This 2ml tank does the job.
Easy to refill with no complicated mechanisms like other manufacturers.
Just unscrew the top and you're good to go.
The Crios is a wider tank at 24mm and fits the new 810 drip tip size like the Smok TFV8
It comes with 2 different coils a 0.25 and a 0.65 Ohm.
The 0.25 Ohm is rated at 30-50W
The 0.65 Ohm is rated for 35-65W
Both give a great vape at average power levels.