Brass Knuckles vape pen is among the special vaping pens out there in two battery capacities of 900mAh and 650mAh. On top of that, it utilizes the pre-stuffed THC cartridges as it is often a 510-threaded pen. The vape pen on the skin has the precise condition similar to a pen. At the end of the pen, it could possibly suit 500 thread cartridges. I