Master Flow 8″ X 25′ Insulated Flexble Duct with R6 Insulation, offering 33% More Insulation Than The Standard| Comes with UL181 Standard of Safety and is ETL Listed
Master Flow 10″ X 25″ Insulated Flexible Duct with R8 Insulation and Thermal Efficiency| Meets The UL181 Standard, The Duct Meets high Safety and Quality Standards, with Heavy Duty Silver Jacket
Master Flow 12″ X 25′ Insulated Flexble Duct with R6 Insulation, offering 33% More Insulation Than The Standard| Comes with UL181 Standard of Safety and is ETL Listed