"Obsidian Kaishan" navel bar :
Dimensions : ball : 5mm - bar : 1.6mm (diameter) / 15mm (length) - pin : 15mm
Material : Brass and steel, obsidian stone, nickel and lacquer free
How to clean brass: Clean the brass jewel with soapy water, rinse, then dry and polish with a microfibre cloth for a better result.
