Ruby Ball for Measurement Instrument Sapphire Ball for Lens Communication Medicine Area

plastic tray or bottled

Ruby ball ,sapphire crystal is one of corundum gemstones. it is  mainly characterized by wear resistance, high hardness, corrosion resistance and small friction coefficient. it is an idea material for precision instrument, machinery and bearing; sapphire glass has good infrared transmission and chemical stability. it is also widely used in all aspects of infrared military equipment, such as far-infrared sight, night vision camera and so on.