Leather D-Ring O-Ring Collar in BlackA standout classic, the Leather D ring O ring Collar in Black. A great addition for all bondage fans, with the classic black colour in the high quality tough leather, this item is a core accessory in every bondage collection. It comes with a D ring and O ring attachment so you can attach all sorts of bondage accessories including gags, bondage rope, leads and harnesses! This collar will fit a neck circumference size of 40cm 50cm.