Features 1、[MAIN PURPOSE] The aperture gauge is mainly used to measure the inner diameter and hole of thin walled parts, plastic pipes, etc. 2、[STAINLESS STEEL] Made of excellent stainless steel material, hard and wear resistant, not easy to deform or rust. 3、[HIGH ACCURACY] Precise structure design, with accuracy of 0.1mm, convenient and quick measurement. 4、[COMPACT SIZE] The conical feeler gauge is compact, has simple and reasonable design, and is convenient to use and carry. 5、[MEASURING RANGE] With scale marks, the measuring range is 3‑15mm, and the application range is wide. Specification Item Type: Aperture Gauge Material: Stainless Steel Measuring Range: Approx. 3-15mm / 0.1-0.6in Type: Thread Gauge Accuracy: 0.1mm Package List 1 x Aperture Gauge