CONVENIENT TO MEASURE: Taper welding gauge is made of stainless steel, small size and light weight which is easy to carry. Simply structure, convenient to measure. You can place the gauge on a hole and read the measured value. PRECISE RULER SCALE: Accurate figures and increments are etched into surface, easy to read DIFFERENT GAUGES: There are several different gauges in one set that can meet your different need. APPLICATION: Taper gage set suitable for the measurement of inner diameter, aperture measurement, groove diameter and so on. MEASURING RANGE: 1~7mm, 8~14mm, 15~21mm, 22~29mm Specification: Material: Stainless steel Measuring Range: 1~7mm, 8~14mm, 15~21mm, 22~29mm Resolution: 0.1mm Weight: 44g / 1.6oz (approx.) Package list:1 set * Gauges