Aperture Gauge, 0.1mm Accuracy Conical Inner Diameter Ruler Easy Measurement 15-30mm Portable With Scale Marks For Thin Walled Parts For Plastic Pipes

[MAIN PURPOSE] This aperture gauge is suitable for measuring the inner diameter and hole of thin walled parts, plastic pipes, etc [STAINLESS STEEL] Made of excellent stainless steel material, hard and wear resistant, not easy to rust or corrode [HIGH ACCURACY] The measuring range is 15-30mm, with 0.1mm accuracy, has high efficiency and accuracy [SIMPLE STRUCTURE] The conical gauge has simple structure, and the measurement is convenient and quick.