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. E Series Horizontal Wire Manager Dual-Sided, 2U, 3.5" x 3.0" Front, 3.5" x 6.0" Back, Black, 1/box.