Tubular Inside Micrometers are precision measuring instruments used to measure the inside diameter of cylindrical objects. These micrometers consist of a measuring head and a tubular extension rod that can be adjusted to reach the desired depth of the object being measured. The measuring head is designed to grip the object securely to ensure accurate measurements.

This type of inside micrometer is especially useful for measuring the inside diameter of pipes, tubes, and other cylindrical objects with narrow openings. The tubular extension rod allows for easy insertion into the object being measured, and the measuring head provides a precise reading of the internal diameter.