This non-vented, fixed position shelf from Quest Manufacturing is designed for mounting equipment in standard floor enclosures and 4-post open frame racks. It is 2RU in size and features adjustable rails that can expand from 18" to 31". Constructed from heavy duty cold rolled steel and with a weight capacity of up to 120 pounds, this shelf also includes a set of #12-24 mounting screws and a black powdercoat microfinish to match rack and enclosure colors.