Designed to provide cable management horizontally on the front and back of a rack, the black WMB series includes several variations and sizes. The wire management brackets featured smooth-edged fingers allowing cable to be pulled through at any location. Equipped with extended length covers to keep excess cable hidden. Horizontal Wire Manager, Dual-Sided 3U, 4.0" x 5.0 " Front, 4.0" x 5.0 " Rear, Hinged, Black, 1/box.