Surface Roughness Tester Standard Drive Unit Type Standard Detectors 17.5 Millimeter 360M Crometer (-200Micrometer To +160Micrometer) Along With Calibration Certificate Traceable To Nabl, Nabl Approved Lab Calibration Certificate Should Be Attached Along With The Supply.Make/Brand: Mitutoyo/Mah R/Tesa [ Warranty Period: 12 Months After The Date Of Delivery ] ]