Gem round bar with artificial corundum single crystal as material,Use sapphire / ruby with corrosion resistance,Wear resistance, thermal stability and chemical stability,Optical performance and other characteristics,Produced corundum rods and plunger rods, often used in medicine, precision machinery, precision measurement and detection and laser technology applications and so on. Such as: plunger rods, measuring rods, laser rods, laser range finder, laser guide instrument, gyroscope and so on.The specific type can be changed to polished rod, shaft tip, chisel, rotor cross pin, contact round bar (single, double), step round bar and so on.