One  NEW Aftermarket AGD50A   Replacement Dial Indicator for Sunnen  AG300 and AG400 Precision Measuring Gage reads in .0001 thousands it is marked .001 which is what the reading from 0 to1 is , replace you indicator at a fraction of the cost of New from Sunnen. $12.50 to ship to lower 48 states,I always combine shipping. Thanks For Looking, Don.