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Chinese Supplier 220kv Ceramic Post Insulator, High Strength Porcelain Insulator for Switchgear. High Bending Strength: 12.5kN bearing capacity ensures stability in high-voltage power transmission. ISO Certified Quality: Certified ISO9001, ISO14001, ISO45001 with strict IEC60168/60273 compliance. Custom Design Support: OEM/ODM services available for design, dimensions, voltage, and strength. Professional Packaging: Customizable plywood or fumigated wooden cases with steel straps for safety. Comprehensive Support: 24-hour reply, on-site installation consultation, and lifetime technical aid. Established Manufacturer: Professional factory since 1936 with advanced dry/wet process production lines.