14g, 16g, or 18g Solid Titanium Captive Bead Ball Closure Ring - BodyJewelry.com
Amazon.com: Bodytrend Surgical Steel Ball Closure Ring (BCR) Piercing with Thickness 8G(3.2mm) Comes in Size of 15mm & 19mm and is Used as Piercing for Septum, Eyebrow, Nipple, Lip, Nose and More. :
How to Open / Remove & Close a Ball Closure Ring BCR without Pliers - YouTube