Clicker button - 1 piece hinged buckle stud abdominal clicker buckle, 12 mm for your short abdominal piercing. Different belt hook diameters - bar thickness: 14 specs / 1.6mm; Inner diameter of the hoop: 12mm; According to your different needs, choose the Hoop that best suits your abdominal piercing. Hook & Loop Material - we use high quality 316L surgical grade stainless steel. SURGICAL STEEL is a special type of biocompatible and skin-friendly stainless steel, non-corrosive and irritating, nickel-free, hypoallergenic, long-lasting, shiny and easy to clean. Snap Hook design - navel bands and rings are fun ways to show off your style and add a different element to your vacation or poolside outfit. This hinged Belly ring features cubic zirconia with 1mm brilliant lines. It has a steel surgical column.