Dasqua Surface roughness gaugeAustralian Stock All standard roughness gauge included together with comparison chart Easy to check all surface roughness. Set include gauge as below: consist of 30 specimens. size: 7 8x3 8",including: 2 specimens checking Flat lapping 2 and 4 " AA 4 specimens checking External grinding 8,16,32 and 63 " AA 6 specimens checking surface grinding 2,4,8,16,32 and 63 " AA 6 specimens Turing 16,32,63,125,250 and 500 " AA 6 specimens checking Vertical
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