High Voltage Electrical Insulating Sheet Disc Board Made in High Purity Alumina 95% 99%. High Purity Alumina Material: Made in 99%~99.5% Alumina for superior insulation and durability. Customizable Dimensions: Dimensions, shape, and color can be customized to specific requirements. Superior Mechanical Strength: High hardness (HV 1700) and rupture strength (>3500) for heavy duty use. Corrosion & Wear Resistant: Features high wear-resistance, insulation, and corrosion preventive properties. ISO9001 Certified Quality: Certified under ISO9001 standards ensuring consistent product quality. Competitive Pricing: Reasonable price with customer-trusted quality and good service.