14G 4mm Synthetic Opal Internally Threaded Replacement BallProduct Details 14 Gauge 4mm Synthetic Opal Internally Threaded Replacement Ball Lost a ball end? Forgot to close the sink drain while changing your jewelry? This 4mm ball end is designed to work with any 14 gauge internally threaded barbell. It's made with a prong set, white synthetic opal and for a look for simple, on trend style. So if you need some balls, we have a simple solution to your woes. Specifications 14 Gauge (1. 6mm), Internally