DUCT FLEXIBLE INSULATED 4inx25ft R4.2 (6

ATCO 070RF, 4"X25' - Boxed R4.2 flexible duct w/ grey polyester vapor barrier

Atco Flexible Air Duct, Insulated, Series: 70 Series, 4 in Inside Dia, 25 ft Length, 5000 fpm, 0.6 perms Vapor Transmission, 10 in WG, Polyester Jacket, Gray, Domestic

ATCO #070, 076, and 078 are UL 181, Class 1 Air Ducts and are manufactured with a tri-directional fiberglass scrim reinforced, grey polyester outer jacket. The inner core of all three products is air-tight and designed for low-to-medium operating pressures in HVAC systems. ATCO #076 and 078 have increased insulation for superior thermal performance.