Master Discs Instrument Information
A round metallic plug, often containing end grips to prevent heat distortion from handling.

Common Uses
- Quick measuring of diameters (outside and inside) of round machined parts, such as a pipe, hose, tube or sphere.
Common Types
- Diameter Type (Outside, Inside)
- Readout (Digital, Vernier)
Measurement Parameter
- Outside Diameter
- Inside Diameter
Gage Type
- Attribute
Calibration Discipline
Calibration Equipment Used
- Varies