T-Plate Gauge Compatible With Dimension Internal (ID) and External (OD) Dimension Type Inch Incline Angle Range 0 Degrees to 90 Degrees Includes Indicator Yes Maximum External Measurement - Inch 5 in Maximum External Measurement - mm 127 mm Maximum Internal Measurement - Inch 3 1/2 in Maximum Internal Measurement - mm 89 mm Minimum External Measurement - Inch 1/4 in Minimum External Measurement - mm 6.35 mm Minimum Internal Measurement - Inch 3/4 in