The AKG H500 shock mount is designed for permanent installation of GN Series E and ES version goosenck modules from the Discreet Acoustics Modular series. This mount provides attenuation of structure-borne noise by 12 dB. The AKG H500 shock mount consists of a durable plastic shell and flexible inner rubber boot. It allows for quick and easy set up and break down of a sound system. The AKG H500 requires a mounting hole of 2.0 inches (50 mm).