Duct Box, Insulated Board, Return, 4 in WD, 4.5 in HT, 8 in LG, 30 gauge THK, Galvanized Steel, Black Interior, ASTM C1338, R6 Insulation, Flange
Note – We recommend ordering it as part of a complete system to ensure safe delivery. Orders placed for individual parts are shipped at the buyer’s risk, and we will not be responsible for any damage that occurs during transit.
