Starrett

Starrett 724LZ-30 Tubular Bow Micrometer is a tubular bow micrometer for large outside dimension measurement. Source details include The Starrett 724, 724M Series Tubular Bow Type Micrometers with Interchangeable Anvils are made for better precision measurement of large outside dimensions.

Starrett 780XTZ-312 Internal Micrometer is an internal micrometer for internal dimensional measurement over an extended range. Source details include The Starrett 780XT Series Electronic Internal Micrometer provides IP65 level of protection against coolant, water, dirt and dust in hostile shop environments.