Feature Highlights: 1. 64mm Large Prism Lens: Features a 64mm glass lens with a bright, clear texture for high measurement accuracy and improved work efficiency. 2. Optical-Grade Glass: Made from polished optical glass with a uniform, fine coating to ensure lasting durability. 3. Reliable Performance: Precision-crafted for transparency and consistency, delivering minimal error and a high pass rate. 4. Precise Specifications: Offers an aperture range of 0.2–1, irregular aperture of 0.1–0.3, and a comprehensive angle of 2–8 minutes. 5. Wide Application: Ideal for surveying, optical alignment, drilling, and other precision industries requiring dependable optical components. Product Details: This copper-coated pyramidal optical glass prism is designed for accuracy and durability in demanding tasks. Its large 64mm lens provides bright, clear imaging for reliable measurements, while the optical-grade glass and fine coating ensure long-term performance. Easy to integrate into surveying, mapping, and precision optical systems, it helps boost efficiency and reduce errors in professional applications. Specifications: - Lens Diameter: 64mm - Material: Optical glass with copper coating - Aperture Range: 0.2–1 - Irregular Aperture: 0.1–0.3 - Comprehensive Angle: 2–8 minutes - Typical Uses: Surveying, optical alignment, drilling, precision engineering