3-Point Internal Micrometer With Interchangeable Radiuses Anvils Of Tool-Steel For Optimum Ce Ntering, New Constant Force Digital Readout With L.C. 0.01/0.001Mm, Metric/Inch Switchable, Inbuilt Ip67 Electronics, Rs 232 Output, Inbuilt Bluetooth Data Transmission, Operational Range: 300-350 Mm, With Ca Libration & Warranty Certificate, Should Include: Digital Display Unit, Measuring Head With Exchange Able Anvils Of Range 300-325Mm, & 325-350Mm With ? 325 Mm Master Setting Ring With Nabl. Model -Xt 500 Series Of Baker, Make :- Baker , Bower , Naren Or Similar [ Warranty Period: 30 Months After The D Ate Of Delivery ] ]