... , Rz) MOQ: 10 PCS 2 Parameters Surface Roughness Tester (Ra, Rz)Specifications:Parameters: Ra, Rz Measuring Range ... Cutoff length (l): 0.25mm / 0.8mm / 2.5mm optional Evaluation length: 1~5 cut off optional Driving ... = 0.8mm Vt=0.5mm/s**** sampling length = 2.5mm Vt=1mm/s**** returning Vt=1mm/sResolution : **** 0 ... Temp. 0~50°C**** Humidity <80% SRT-6200 2 Parameters Surface Roughness Tester (Ra, Rz)