The CR45U40001 4-post rack can be customized with compatible accessories to meet specific requirements. The rack ships knock-down; assembly is required. It is covered by a 5-year limited warranty. 45U Carbon 4-Post Open Frame Enclosure RACK MOUNTING COMPATIBILITY: The CR45U40001 is compatible with all EIA-310 compliant 19" equipment ADJUSTABLE RACK ANGLES: Vertical rack angles can be adjusted in 1" increments for mounting depth requirements from 22 to 40 inches. Depth index numbering ensures quick and consistent rail placement. Rack units are numbered front and back for easy equipment installation HIGH-PRECISION DESIGN: Frame and heavy gauge mounting rails provide for static load ratings of 1,763 pounds. Optional castors available (CRA60002) 5-YEAR LIMITED WARRANTY