Portable Surface Roughness Tester Portable and robust for efficient use in work shop, yet delicately precise for inspection. Features include... Parameters: Ra, Rz, Rq, Rt Ra, Rq: 2 - 590μin Range Rz, Rt: 4 - 1968μin Range Resolution: 0.01μin Probe... Piezoelectric Type Stylus Radius / Angle: 393μin / 90° Stylus Material: Diamond Measuring Force: .012ozf Measuring Unit: μin / μm Cut off: .01/.03/.1" Evaluation Length .05" for cut off .01" .15" for cut off .03" .2" for cut off .1" Traverse Speed: .03"/s Built-in Rechargeable Battery Dimensions: 4.17" L x 2.75" W x 0.94" H Weight: 0.44 lb Package includes... Main Unit Calibration Block AC Adapter