... a more precise measurement. By means of 10x lens, 20x lens or 20x lens and 40x lens, the tester has a wider measurement field ... and broader usage range. The set of lens (2 pieces lens ) can be selected according to the users requirement. ... test able Largest test table, “V”Shape test table10X Digital Micro Lens, Level, Adjustable Screw, Vicker Hardness Block, RS232 Interface Line ( ...