Adjustable telescoping rackshelf shall be Middle Atlantic Products model # VSA-2744. Shelf shall offer a telescoping depth of 27" to 44". Overall width shall be 19 (483 mm). Useable width shall increase from 17.19 (437 mm) to the useable width of the enclosure when the shelf is flipped before being installed. Hemmed 16-gauge steel construction provides a 500 lb. weight capacity. Included support brace shall prevent deflection across the shelf. Shelf shall be vented for superior equipment cooling. Slots provided for anchoring equipment with straps up to 1.25 (32 mm) wide. Racking height shall be 1.5 (38 mm), or less than one rackspace. Shelf shall be finished in a durable black powder coat. Shelf shall be GREENGUARD Indoor Air Quality Certified for Children and Schools. Shelf shall be RoHS EU Directive 2002/95/EC compliant. Shelf shall be manufactured by an ISO 9001 and ISO 14001 registered company.