Precision aperture for innerdiameter measurement — engineered for fast, reliable checks of small bores and thinwalled parts Key benefits Accurate, repeatable readings: 1–6.5 mm measuring range with 0.1 mm divisions gives clear, consistent measurements for small inner diameters. Saves inspection time: simple, direct measuring action improves efficiency when checking multiple parts or assemblies. Durable construction: made from quality steel that is hard, wear resistant, and resistant to corrosion for long service life. Easytoread scale: engraved numeral scale on the cone lets you view readings clearly without guessing. What it does and why you need it Designed specifically to measure inner holes of thinwalled components and the inner diameter of plastic pipes, so you get the right tool for these common smallbore tasks. Helps detect outofspec parts early in production or during maintenance, reducing rework and waste. Compact and straightforward to use for inspectors, machinists, and technicians who need reliable innerdiameter checks. Specifications (consistent with original) Measuring range: 1.0–6.5 mm Scale division: 0.1 mm Material: quality steel — hard, wear resistant, and not prone to corrosion Markings: engraved numeral scale on the cone for clear readings Practical use scenarios Quality control in plastic fabrication: Verify inner diameters of small plastic pipes and tubing immediately after molding to ensure parts meet specifications. Assembly and maintenance of thinwalled components: Check inner bores of thinwalled sleeves, bushings, or housings during fitup and work. Workshop inspection: Quick, onbench checks of small bores and precision parts to confirm dimensions before final assembly. User guidance Use within the 1–6.5 mm range and read values from the engraved scale with the 0.1 mm divisions. Regularly clean and lightly oil the steel surfaces to prolong life and maintain corrosion resistance. Reliability and performance Built to withstand routine inspection use while maintaining clarity of scale and measurement accuracy through robust material selection and engraved markings.