Lambro 450 / TD450 Aluminum Flex Duct (4-ply; Pure Proflex; 50ft; Nonretail bulk)

• 4-ply flex air connector for bathroom venting; do not use for dryer venting;• Ideal for applications where building codes require use of all-aluminum ducts;• Fire-retardant, with max operating temperature of 250deg F;• Max air handling capacity of 5,000 FPM;• 4 in. diameter x 50 ft.;