This is a brand new spring loaded 510 connector with spring loaded firing pin has a 22 mm base.
It adds a Stronger Spring and a hole on the side of the center pin.This makes it easier when soldering your positive wire to the center pin.
The spring made of stainless steel + brass and carries no current meaning you don't have to worry about the spring clasping when running high current through it.
100% brand new and high quality
Material: Metal and Plastic