Provides a clear distortion free image. Exchangeable precision measuring scales for various applications and allows fine focusing via handy focusing ring. Comes with solid plastic box providing space for other scales, supplied with standard scale no. 1152-01. Measuring range 20mm, 1/10 mm graduation. 10X Magnification 40D Diopter Achromatic lens Glass lens .9 inch lens size Eschenbach#: 1154-10. Sold Individually. Case Qty: 1 .