The newly developed highly stable mirror mounts of the MHX series with hollow frame design offer a higher moment of inertia, lower mass and maximum stiffness of the 25.4 mm (1'') mount. This results in a rapid thermal equilibrium, unlike traditional mounts. The temperature test cycles show very stable, consistent and repeatable positioning. Standard included adhesive and pin connections of the holder are used for easy fixation of the optics (e.g. in industrial applications).