For Dell and Buffalo SwitchesThe rack mount kit is compatible for Dell PowerConnect 2000 series, Buffalo GU series and Buffalo MP series switches. Please check the compatibility model list before purchasing to ensure this rack ear is compatible with your switch. Size and Package The length between the two screw holes of the mounting ears is 14mm (0.55 inch). Each kit contains 2 rackmount ears, 18 switch screws (9 x M3 and 9 x M4), 4 sets of cabinet kits (screws + snaps).