3D Scanner Markers Specifications: 500pcs 3D scanner dots in total. Each sheet contains 3D scanner markers with an inner diameter of 2mm and outer diameter of 4mm.Industrial-Grade Precision: Designed for industrial 3D scanning applications, these markers provide accurate reflection for optimal scanning accuracy. The adhesive foil backing allows for easy application in tracking scanning projects.Accurate Tracking Dots: These diffuse reflection markers are widely utilized in high-precision industrial and consumer 3D scanning processes, suitable for applications such as 3D scanning, reverse engineering, inspection, and more.