Single-Sided, w/cover, 1U- Large pass-through holes allow front to rear cabling- Dual hinged cover for quick access to cables without having to remove the cover- Large front slotted openings easily accommodate patch cords moves, adds or changes MACs- Standard 19In. wide compatible with racks, brackets and cabinets- Round edges on openings protect cables from snag and damage to cable- Innovative and cost-effective plastic design