Rack Mount Kit 19" Large Switch Rack Ears Compatible for Cisco Small Business Series (18-50 Port Models) RM-300-19. - [Package Included] Each kit contains 2 large rack mount ears, 8 switch screws, 4 sets of cabinet kits (screws + snaps). Perfect for Cisco switch rack mounting needs. - [Only Compatible for Cisco Models] Compatible for most Cisco SF200, SF220, SF250, SF300. SF530, SG200, SG220, SG250, SG300, SG500 and SG550 series small business switches. Please check the compatibility model list blow before purchasing to ensure this rack mount kit is compatible with your switch. - [High Quality Metal] The rack ears are made of thickened metal, which is stronger and has high bearing capacity, durable to use, the installation is firm and not easy to fall. - [Advantages] The rack-mounting ears can better fix the switch on the rack, which is especially suitable for the storage and classification of small commercial switches and facilitates the management of switches.