Digital Tubular Inside Micrometer (Rod)Series 337This is an extension rod type inside micrometer that offers you the following benefits:<ul><li>Interchangeable extensions with cylindrical gage rods are spring-mounted in protective sleeves so you can extend the measuring range.</li><li>Carbide measuring faces.</li><li>Digimatic type, with data output.</li><li>It has excellent resistance against water and dust (IP65 protection level) enabling you to use it in machining situations that include splashing coolant fluid.</li></ul>