Fine Quality 6x4mm Oval Sunstone Cabochon Prop 65 - Carbon The Bergeon 6411-P Nylon Sleeve

The Bergeon 6411-P Nylon Sleeve is designed to protect the interior surface of rings during sizing and stretching operations

Made from properly hardened steel for durability and long service life

and Extra Fine — they allow precise control over the level of surface refinement at each stage of the finishing process

A built-in thermometer port provides an additional point of reference for internal wax temperature — compatible with wax thermometer 122

They are made of the finest heat-tempered

Fine Quality 6x4mm Oval Sunstone Cabochon Prop 65 - Carbon The Bergeon 6411-P Nylon SleeveOregon Sunstone is a natural, all American gem sourced exclusively from mines in the state of Oregon and received no treatment of any kind. A member of the Feldspar group, Oregon Sunstone is prized for its lively optical phenomenon caused by flat, reflective copper inclusions contained within the stone. This distinctive sparkly luster is known as aventurescence commonly referred to as Schiller and gives each stone a dynamic, light catching quality