... ISO9001:2008 & 2000; minimum tolerance: +/-0.0001 bronze gear and wormsSpecifications:1) Suitable for various automotive, electronic, telecommunications, ... roundness meter, projector meter, microscope, gear-test meter, surface measuring meter and so on4) Precision/tolerance:0.0001mm5) ... Iron, Copper and Aluminum, and so on, with an output of over 1 million pieces per month. bronze gear and worms