An ADD - ON to a necklace item. THIS IS IN ADDITION TO WHAT THE LISTING ALREADY COMES WITH.
This is to add length to your necklace. For example, if the necklace comes as a 17" length with a 1.5" extender and you want this to be 18" length. You would add 1" of chain length (not extender length).
Chain lengths are available for 14K gold fill, rose gold fill, and sterling silver.