Use this professional micrometer from RS PRO to measure the internal diameters of objects. It's made of hardened stainless steel that provides reliable protection from rust, so you can also use it with wet media. Its chrome satin finishing prevents glare from light sources, so you get a clear view of the item you're measuring.
This instrument is designed for high precision measurements and is accurate right down to 0.005 mm. It's manually operated without the need for batteries or an external power source. Microfine calibrations on the barrel and thimble make taking accurate readings easy. It comes supplied in a fitted case with everything you need to make accurate measurements, including a ratchet stop to ensure uniform pressure between the measuring surfaces. The set also includes a micrometer head and locking screw.

• Internal micrometer type
• Accuracy of 0.005 mm
• Not battery operated
• Metric measurements
• Maximum measurement of 30 mm (nanometres)
• Measurement range of 5 mm to 30 mm
• Resolution of 0.01 mm
• Set contents include a micrometer, spindle locking screw, barrel, sleeve and fitted case with adjustment tools