Hit iT Mechanical :
You can choose as material SS, Brass or Copper for Top Caps, Switch and fire button.
Tube Finish :
Brushed SS and Copper don’t forget that you get hand brushed tubes not chemical process applied
Size available :
18350, 18650 battery size
Fire switch :
Recessive fire button ( one of the pioneer in the industry ) no need for lock systems. Spring loaded. At shortage the spring will collapse to protect you.
As option magnets can be used instead of spring