Si3n4 Silicon Nitride Step Shaft Roller Welding Pin Ceramic Blade Customized Factory. Extreme Hardness: HRA90 hardness and HV0.5 >1550, making it one of the hardest substances in the world. Customized Dimensions: Weight and blade type are fully customizable to meet specific industrial needs. Low Density Material: Density above 3.2g/cm3, offering high strength with lightweight properties. Corrosion and Wear Resistance: Superior performance in harsh environments including chemical and petroleum industries. Fast Delivery: Lead time of 10 days for stock items, with flexible scheduling for custom orders. OEM/ODM Services: Full customization support for color, shape, and technical specifications. High Precision Manufacturing: Advanced CNC and grinding equipment ensure lowest tolerance for precision parts.