Outside Micrometers with Interchangeable Anvils Featuer:
Steel-plate frame(within 300mm/12" range)
Pipe combined frame(over 300mm/12" range)
Resolutin:
Within 300mm/12": Steel-plate frame 0.01mm; 0.0001"
Over 300mm/12": Pipe combined frame 0.01mm/0.001"