The AKG H 600 shock mount is designed for permanent installation of E and ES version gooseneck modules from the Discreet Acoustics Modular series. This mount provides maximum attenuation of structure-borne noise (20 dB). Each mount consists of a durable low profile plastic shell with a flexible inner rubber boot, and, for added security, features a locking clutch that prevents easy removal of the gooseneck module. Included with the H 600 is the A 608 insert. The A 608 grips the narrow section of the gooseneck and allows for custom height adjustments. The H 600 requires a 2.1 inch (53 mm) mounting hole.