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High Strength Suspension Insulator for Electrical Power Transmission Lines IEC Insulator U120b. High voltage disc porcelain suspension insulator, mechanical failure load 120kN. IEC Standard Compliance: Manufactured to IEC standards with full pre-delivery quality inspection. Brown glaze porcelain, anti-corrosion, suitable for 110-220KV overhead transmission line. Customization Available: Offers mold making, size customization, and logo branding upon request. Comprehensive Warranty: Standard 12-month warranty with optional extension up to 36 months. Global Technical Support: 24/7 assistance, parts supply, and on-site or remote training available.