3-inch PC material Non-Electronic replacement cover for security camera, vandal-resistant transparent dome cover. Feature: 1. Product color: clear color 2. Material: Polycarbonate (anti-aging, anti-UV) 3. Packing: Surface covering film 4. Distortion <= 0.16. This dome cover is manufactured using precision molds and formed through injection molding processes. Characterized by its low distortion, and anti-aging properties, it stands out as a product that other manufacturing techniques cannot replicate. The total diameter including the edge of the base:85mm (3.35 inches) The external diameter of the spherical surface excluding the edge of the base: 80mm (3.15 inches) The internal diameter of the spherical cover: 76mm (3 inches) The total height of the spherical cover: 45mm (1.77 inches) The width of the base edge: 2.5mm The thickness of the spherical cover: 2mm This product contains no electronic components and does not require FCC certification Color: clear / transparent; Material: Polycarbonate (PC) material, Non-Electronic Replacement Cover The total diameter including the edge of the base:85mm (3.35 inches); The external diameter of the spherical surface excluding the edge of the base: 80mm (3.15 inches); The internal diameter of the spherical cover: 76mm (3 inches); The total height of the spherical cover: 45mm (1.77 inches); The width of the base edge: 2.5mm; The thickness of the spherical cover: 2mm Transparent, Distortion <= 0.16. This dome cover is manufactured using precision molds and formed through injection molding processes. Please carefully check the detailed dimensions drawings of the dome cover in the left picture before purchasing