phawu:

1, 150mm / 6 "Professional Digital Vernier imbi

2, Material: Stainless

3,  mm/inch/fractional conversion at any posttkmzero setting at any position

4, Can measuring inner diametecouter diamete, depth and step

5 , Low voltage warning by flashing display

6, Durable plastic display case

7, 5-Manual power on/off or auto power off