LL Building Products | sku: 3582270 Master Flow 48 In. X 120 In. Duct Board - R-6 Log in for pricing Compare
LL Building Products | sku: 3582270 Master Flow 48 In. X 120 In. Duct Board - R-6 The Master Flow 48 in. x 120 in. Duct Board - R-6 features fiberglass construction with an FSK backing for sturdiness over time. Cut this duct board to size and use it to build your own HVAC fittings or trunk duct, and then assemble it with fiberglass... Log in for pricing