Premier Plenum Duct is a flexible, non-metallic, corrugated raceway used for effective interior cable and fiber optic management. Premier Plenum meets UL-(910) standards for the National Electrical Code, Article 770, and satisfies UL-2024 standards for low smoke and flame propagation. Premier Plenum is offered in 3/4", 1", 11/4", 11/2" and 2", with pre-installed pull tape for easy cable installation. The standard color is orange and is offered in a variety of other colors. Sequential marked footage is standard. Custom options, such as multiple colors per reel and Slit Duct, are also available. Future growth or maintenance of your interior cable system is made easy with Premier Plenum.