This beautiful round barbell is made of high quality surgical steel 316L and is famous for its high durability and flat texture. If required, the scratch proof PVD coating provides a powerful color selection and is further enhanced by highly polished surfaces. There is a threaded surgical steel ball at each end of the opening ring. Both spheres are decorated with a ring of shining crystals that are best protected by a transparent epoxy layer. The inner diameter of this jewelry is 1.2 or 1.6 mm, optional. Material of product :epoxy resin 316LSurgical stee/F136 titanium Surface treament: highly polished/coating Product Color: Natural Color ( Steel ) | PVD Black | PVD Gold | PVD Rosegoldl Color of crystal:clear Bar thickness : 1.2/1.6 mm Inside diameter as 1.2mm bar thickness:6/7/8/10mm Inside diameter as 1.6mm bar thickness:6/8/10mm The size of ball(1.2mm):3&3mm The size of ball(1.6mm):4&4mm All sizes are approximately All dimensions can be customized !