3D Tester packed in Wooden Case -3D tester-ISO9001 certificate -Diameter of tester: 20mm -Measuring Feeler Dia. 4mm -Ruby Contact Point of tester -The error: 0.008mm -The division of the dial: 0.01mm/Radial; 0.0032mm/Axial -The measuring range of the feeler: 0-10mm/Radial and 0.0032mm/Axial. Model No. 605-2003 / with ruby contect point Model No. 605-2004 / with steel contect point. In addition, we also produce Dial Indicators, Centering Indicators, Thickness Gages, Z-Axis Zero Setters, etc. For more details of our Measuring Instruments, please kindly visit our website to browse and download our latest catalog.