StarTech.com 2.4 x 3.9in Vertical Cable Management D Ring - 1.5U Metal D- Ring Hooks - Wire Organizer for 2 or 4-Post Network/Server Racks (CMHOOKMW) - cable management ring - 1U
L-com 19" Rackmount Front Cable Manager with D-Rings & Brush Grommet 1U - RP00015-1