Silicon rubber ring D=84/60

This ring plays a critical role in the success of the gold jewelry casting process. The dimensions D=84/60 indicate an outer diameter (OD) of 84 mm and an inner diameter (ID) of 60 mm (giving the rubber ring a width of 12 mm). Manufactured from premium, highly flexible silicone, it withstands high operational temperatures without melting or losing its elasticity. It is placed under the flask or on the vacuum chamber rim to ensure an airtight seal, creating the perfect vacuum pressure required to pull the molten gold into the finest details of the jewelry mold, thereby preventing casting defects like porosity or air bubbles.