Stub Extensions are compatible with Hitachi stages and sample holders. They are available in three heights (12mm, 18mm and 25mm) and are used on the Hitachi T-Base and Dovetail Stage Adapters to increase the height of the assembly. Can be used with any of the Modular SEM Specimen Holders or with Hitachi mounts with M4 thread. M6 thread on brass extensions and M4 thread on top. Stub extensions can be stacked. Made of brass with stainless steel M4, complete with aluminium locking nut. Short button (AG15372) is needed when used with the Dovetail Stage Adapters (AG15371 or AG1597).