Mitutoyo Outside Microm. Anvil Extension Collar 1600-1800mm 105-421Outside Micrometer with Anvil Extension Collar This Outside Micrometer comes with Extension Anvil Collars. It offers you the following benefits: The collars have a stable and rugged yet lightweight tube construction, and are ideal for large micrometers. The 50mm spindle stroke gives you extended range compared to standard spindle types. Anvil collars extend the measuring range even further. The setting standards supplied cover the whole measuring