Best 3 Axis Digital Readout YH800 3 DRO Multifunctional 3 Axis Digital Readout
Storage temperature -3070 degree centigrade. UK, US, EU Plug available. 1µm 3axis digital readout dro + 3pc linear scale kit mill lathe high precision so to accomplish a perfect project. Answer 250mm is enough, its measuring range can reach up to 270mm, so you can use if you need to measure 255mm.