Deflecto Supurr-Flex Metallic Duct, Flexible Multi Layer Transition, Silver, 4" x 20' (F0420B/2)

• 5-ply flexible aluminum duct has a 4” diameter and 20’ length
• Easy to install and designed to replace vinyl ducts
• Fire resistant aluminum exterior; No exposed polyester inside or outside
• Operating temperature range 0 to 265 degrees F
• For optimum dryer performance and safety, be sure to clean ducts over time