available in metallic and fiberglass.
2. Solid bottom metallic with solid metal covers for non-plenum rated cable in environmental air areas
3. Standard widths of 6, 12, 18, 24, 30, and 36 inches
4. Standard depths of 3, 4, 5, and 6 inches
5. Standard lengths of 10, 12, 20 and 24 feet
6.Other size also available