All standard roughness gauge included together with comparison chart
Easy to checking all surface roughness
Set included gauges 30 specimen size 7/8 x 3/8 as: 2 specimens checking flat lapping 2 and 4 micron inch AA 4 specimens checking external grinding 8, 16, 32, and 63 micron inch AA 6 specimens checking surface grinding 2, 4, 8, 16, 32, and 63 micron inch AA 6 specimens turning 16, 32, 63, 125, 250 and 500 micron inch AA 6 specimens checking vertical milling 16, 32, 63, 125, 250 and 500 micron inch AA 6 specimens checking horizontal milling 16, 32, 63, 125, 250 and 500 micro inch AA
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