Feature:1. [MAIN PURPOSE] The aperture gauge is mainly used to measure the inner hole of thin walled parts, the inner diameter of plastic pipes, etc.2. [MEASURING RANGE] The measuring range is 16.5mm, with 0.1mm division value, has high efficiency and accuracy.3. [STAINLESS STEEL] Made of excellent stainless steel material, hard and wear resistant, not easy to rust or corrode.4. [LASER SCALE] There is laser engraved numeral scale on the cone surface, which can clearly observe the readings.5. [SIMPLE STRUCTURE] The taper aperture gauge structure is simple and reasonable, and the measurement is convenient and quick.Specification:Item Type: Aperture GaugeMaterial: Stainless SteelMeasuring Range: Approx. 1-6.5mm / 0.04-0.26inAccuracy: 0.1mm.Package List:1 x Aperture Gauge