These contacts are for Cloud Laboratory's Y-mod_S mod in either 18650 or 21700 size.
The image above shows the completed mod THIS LISTING IS JUST FOR THE CONTACTS
510's SOLD SEPARATELY (CLICK HERE)
The drop down will let you choose the contact material and the size of the mod they are intended for
e.g. 925 / silver 18650 is for contacts made from 925 silver for the 18650 size mod
You will recieve:
Not quite sure what these parts are or want to know more? CLICK HERE