Corrugate Plenum - Dura-Line Innerduct Plenum meets UL listing in both UL 2024 and CSA 22.2 (FT-6). These products meet the UL and CSA standards for low smoke and flame propagation. These products contain 1130 lbs pull-tape (standard) - available 3/4", 1", 1 1/3", 1 1/2" & 2" sizes.
