Aluminum:
Spring loaded connection
Silver plated pin
Supported by 18650 battery (Battery not included)
Brass LINK:http://hotecig.com/Product/Authenti...8650-Mechanical-ModLimited-EditionBrass-74021
White copper LINK:http://hotecig.com/Product/Authenti...chanical-ModLimited-EditionWhite-copper-74020
Spring loaded connection
Silver plated pin
Supported by 18650 battery (Battery not included)
Brass LINK:http://hotecig.com/Product/Authenti...8650-Mechanical-ModLimited-EditionBrass-74021
White copper LINK:http://hotecig.com/Product/Authenti...chanical-ModLimited-EditionWhite-copper-74020