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ANSI Standard Disc Suspension Porcelain Insulators 52-3 Porcelain Insulator. High Mechanical Strength: Combined M&E strength of 80kN with 40kN tension proof test load for reliable performance. Anti-Pollution Design: Creepage distance of 432mm ensures excellent anti-pollution performance in harsh environments. Certified Quality: Complies with ANSI C29.2 standard and holds CCC and ISO9001 certifications. OEM/ODM Service: Flexible customization options available with dedicated OEM and ODM services. 100% Quality Inspection: Every finished product undergoes 100% visual and functional inspection before packing. Competitive Pricing: Superior quality porcelain insulators offered at competitive prices with on-time delivery.