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Alumina Ceramic Tube for Furnace Refractory. High Purity Material: Made from 95%-99.7% high purity alumina oxide for superior performance. Customizable Size: Diameter 1-120mm, Length 100-2000mm, with multi-bore and custom shapes. Fast Delivery: Large stock ensures delivery within 15 days after order confirmation. OEM/ODM Service: Welcome customization from designs or samples for specific requirements. High Mechanical Strength: High hardness and compression strength for durable industrial applications. Excellent Insulation: High dielectric strength and volume resistivity for electrical insulation. Competitive Pricing: Cost-effective solutions due to large quantity stock and efficient production.