Adjustable Parallel Pair, Included Sizes 1 5/16 in to 1 3/4 in, 33 mm to 44 mm, Maximum Size - Inch 1 3/4 in, Maximum Size - mm 44 mm, Minimum Size - Inch 1 5/16 in, Minimum Size - mm 33 mm, Number of Pairs 1, Range - Inch 1 5/16 in to 1 3/4 in, Range (mm) 33 to 44 mm, Thickness 9/32 in, Includes -, Includes Case No, Length 4 3/16 in, Parallelism +/-0.001 in, Tolerance -