4POSTRAILKIT1U is an adjustable rack-mount shelving system that supports heavy UPS systems, as well as other pieces of networking or power protection equipment. 4-post expandable mounting rails offer front to rear support for equipment with 17.5-inch-wide rectangular chassis. Rails adjust to any setting between 2.5 and 36 inches. Includes mounting hardware compatible with square-hole racks. Supports up to 15 pounds (68 kilograms). * Supports UPS systems in 4-post rackmount applications * Adjustable to any length between 2.5 and 36 inches * Square hole rack attachment hardware included * Supports weights up to 15 lbs (68 kgs)