Model Suitability: D4RU30 - S950H, S960H, S970H, X2800H, X2700H, X3800H, X3700H, X4800H, X4700H, X6800H, X6700H Denon Custom Installation rack-ear mount kits are designed to allow easy and secure mounting of all 2020-24 Denon AV Receivers into standard-width custom-installation AV racks. There are three models available to match thirteen 2020-24 released AV components – however, many superseded models may also be compatible*. Made of 1.55mm thick ZINCANNEAL® (a zinc/iron alloy-coated forming steel made in Australia by BlueScope) and powder-coated black, each kit includes a spacer to complete a tidy and professional finish, plus six ear-mounting screws to replace the factory-installed lid screws. *Previous model compatibility is not guaranteed; measure kit suitability beforehand