Eschenbach No. 1256 Metal Precision Magnifier Linen Testers 8x Magnification 32 D Diopter dpt, Silikat Lens 15 mm Diamenter Cut out 20 x 20 mm Height 33 mm --- Developed to meet the requirements of technical applications. Metal precision linen testers Product features: - Precision linen tester. - Brass frame, chrome-plated, silk matt finish. Made in Germany --- Also available on Amazon Marketplace in size 11 mm , 12 mm , 15 mm , 16 mm 20 mm , 28 mm, 14 mm with scale or as accessories cases No. 12002 , 12003, 12005 for the tester. Please see picture 2-4.