CMHOOK1U - StarTech.com 1U Vertical 2.2 x 3.9in Server Rack Cable Management D-Ring Hook w/ Flexible Opening

Network Rack-Mount Cord Organizer Ring (CMHOOK1U) - Cable management ring - black - 1U - for P/N: RK12WALLOA, RK15WALLOA, RK3236BKF, RK4236BKB, RKCONS1708K, RKCONS1716K, RKQMCAB12V2