magnaroute PW-17 Multi-Vendor Rack Mount Kit Compatible with Select 17.3" Wide Cisco, D-Link, Dell PowerConnect, HP V1910, Linksys, and NETGEAR Switches For 17.3" wide (full width) switches only!  Please check the compatibility list below. Each kit contains 2 rack mount ears, 8 screws (M3), 8 screws (M4), and a color-matched high quality cage nut kit (4 x M6) with metal cup washers. Rack ears are made of high strength carbon steel with a black protective coating. Works with over 150 different switches! Use the schematic image to verify hole spacing against your equipment. A perfect OEM substitute for Dell Part WJ690.