APC NetShelter SX 42U 750mm Wide x 1070mm Deep Enclosure Side Panels, Black Wide enclosure with increased cable management options for high density server and networking applications. 42U height to easily roll through doorways. NetShelter SX enclosures are optimized for use with high capacity cable management systems that attach to equipment mounting rails inside enclosures aligning with equipment mounting u-spaces and provide channels for routing and managing cabling.