Industrial Barbell, Industrial piercing, Jewelry, Industrial bar earring, Industrial piercing chain, -chains for the gold tone are gold filled 14K -chains for silver tone are stainless steel 304L Stainless steel 316 L externally threaded bars You can choose a size of 14 or 16 gauge for the bars. The gauge refers to the diameter of the bars 7mm or 8mm for the length of the piercing bars Chains are removable For my similar design follow this link: https://www.etsy.com/shop/triballook Thank you!