Unless specified, items are sold individually (as single pieces)and are externally threaded. These chains are handcrafted exclusively for our range of stores and can be customised to fit your own bar. Perfect for if you have stretched nipple piercings. Just leave a note on your order with your bar gauge/thickness. If customised, it will come as the chain only (no barbell) - to fit on to your existing bar. The below bar sizing is the standard size that this chain will come with. Material : 316L Surgical Steel. Gauge : 1.6mm (14G). Standard for Nipple Bars Barbell Length : Comes with a 16mm bar. Ball Ends : 5mm ball ends Thread Style : Externally Threaded Chain Detail : 26cm top chain length - between bars. Infinity feature has a little weight in it. About 8grams. Sold as a pair of bars connected with chain