Mitutoyo 368-918 3-Point Internal Micrometer Kit, 0.8 to 2" (20.32 to 50.8 mm)
Inside Micrometer Set, Internal Diameter Gage Gauge Hole Bore 5-30mm Range 0.01mm Accurate + Wrench + Calibration Ring + Wooden Box : Amazon.ca: Industrial & Scientific
Three point internal micrometer set, range 20-50 mm, low priced - SHOP SMT-MESSZEUGE
3-Point Internal Micrometer Set 0.275-0.5"
2 to 60 Inch Tubular Inside Micrometer 8 Individual Sets to Choose From ID 1355-
Inner Micrometer Set, Measuring 5‑30mm Range Accurate Durable Inside Diameter Micrometer with Wrench for Woodworking : Amazon.ca: Industrial & Scientific
STARRETT INSIDE MICROMETER SET,6 TO 78 IN - Mechanical Inside Micrometers and Sets - WWG5UAA7 | 128AZ - Grainger, Canada
4 to 20 Inch 6 Piece Inside Micrometer Set 0.001 Inch Graduation ID 16377-