3 New Inside & Outside Precision Calipers This is a new set of 3 inside and outside precision calipers. These are used for measuring inside and outside diameters. You receive: One outside caliper that measures approximately 4 1/4" (108 mm) long One inside caliper that measures approximately 4 3/4" (121 mm) long One inside caliper that measures approximately 4 3/16" (106 mm) long Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design.