Portable Surface Roughness Tester Standard Drive Unit Type Standard Detectors 17.5 Millimet Er 360�M (-200�M To +160�M) For Measuring Surface Roughness Of Wheel Seat And Wheel Disc Bore.As Per Specification-1)Evaluation Parameter Ra,Rz,Rq,Rt,Rv.2) Measuring Range-0.005 -16 Micron Meter,3)Mea Suring Speed (Measuring)-0.25Mm/S, 0.5Mm/S, 0.75Mm/S.4)Power Supply-Via Ac Adapter/Built In Recharge Able Ni-Mh/Li Battery.5) Display- Lcd With Connecting Cable, Roughness Specimen, Carrying Case, Ac Adap Ter, Operation Manual, Quick Reference Manual-Make-Precise/Mitutoyo/Time/Baker Or Similar [ Warranty P Eriod: 30 Months After The Date Of Delivery ] ]