Dorsey Metrology Int’l DS-B1-12103 bore gage range 1.50-2.16″ Grad .0001″
The Dorsey Standard Bore Gage model compatible with the range 1.50″ to 2.16″ (which includes 1.9306″ ) is the DS-B1-10103 (for. 00005″ resolution), DS-B1-10113 (for. 00025″ resolution), DS-B1-11103 (for. 0001″ resolution), or DS-B1-12103 (for. 0001″ /. 002mm resolution).