It is called zirconium rods or zirconium round bar, they are high-quality rods made from zirconium, a rare metal known for its excellent corrosion resistance and high-temperature strength. Zirconium rods are widely used in industries such as nuclear power, chemical processing, aerospace and marine engineering due to their superior performance in severe environments. They are commonly used as fuel rods, control rods, and other equipment that require high-resistance to aggressive chemicals, high-temperature stability, and low neutron absorption. Zirconium rods are available in various sizes and grades, and can be customized to meet specific application requirements.