Item Thread Measuring Wire Set, Included Thread Pitch - mm 0.05 mm to 6.00 mm, Included Threads per Inch 3 TPI to 48 TPI, Length 3.875 in, Maximum Thread Pitch - mm 6 mm, Maximum TPI 48, Minimum Thread Pitch - mm 0.5 mm, Minimum TPI 3, Thread Pitch Range 0.5 mm to 6.00 mm, TPI Range 3 to 48, ACME TPI Range 3 to 16, Yes, Case Type Protective Plastic Sleeve, Material Steel, Number of Pieces 48, For Thread Type Metric, ACME