Digital Tubular Inside Micrometer Range 150-1000Mm, Titanium Coated Measuring Face, Aut Omatic Shut Off To Save Battery Life, Ip 65 Protection. Insize Model No. 3521-1000 Or Equivalent, Least Count 0.001Mm. With Proper Casing Along With Nabl Calibration Certificate. [ Warranty Period: 18 Months After The Date Of Delivery ] ]