Features: brand new and high quality Type:Connector used connect any atomizer and 510 battery. This is a spring loaded 510 connector with spring loaded firing pin has a 22 mm base. The spring made of stainless steel + brass and carries no current meaning you don'for t have to worry about the spring clasping when running high current through it. It adds a for 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. Specifications: Material: Metal Diameter: 22m/0.86inch Package Includes: 1x 510 Battery Connector note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.