Polished shiny IP gold and black color plated stainless steel choker with an O ring in front.The item made from our self factory,we guarantee all material 100% stainless steel,never fade,rusty and keep colors more than 3 years. Please be extremely careful when closing the collar. The hinge has the potential to pinch as you are closing the collar. Circumference are: We are a manufactory of stainless steel and titanium jewelry,more than 95% items on sell produced by ourself,if you have other demand please don't hesitate to contact us. We try our best to offer you 100% satisfaction.