EIA compliant 19wall mount rack shall be Middle Atlantic Products model # DWR-21-17. Overall dimensions shall be 23.4" W x 43-3/4" H x 17.3" D. Weight capacity shall be 250 lbs. Tool-Free Quick-Mountsystem enables one-person installation. Useable depth shall be 15and shall extend into the back pan 3.5. Center section and back pan shall be 16-gauge steel. phosphate pre-treated and finished in a black textured powder coat. Rackrail shall be constructed of 11-gauge steel with tapped 10-32 mounting holes in universal EIA spacing with black e-coat finish and marked rackspaces. Rack shall be constructed to swing open for component cabling access. center section shall pivot for either left or right opening. Rack shall have a rear knockout panel with 1/2. 3/4. 1". 1-1/2. 2and 3electrical knockouts installed in base. and a rear knockout panel with 1/2. 3/4. 1. 1-1/2. 2and 3electrical knockouts. four Decora® cutouts. and BNC knockouts for UHF/VHF antennas installed in top.