The document describes several CNC router models from Ouplan with varying working dimensions from 1100x1100mm to 4100x2100mm. The routers are built from iron and aluminum for rigidity and can be equipped with optional accessories like an automatic tool changer, tangential knife, and crop mark reader. They are suitable for cutting and engraving a variety of materials like wood, acrylic, aluminum, and softer materials using optional cutting knives. The routers have 3 interpolated axes as standard but can be extended to 4 axes.