Dundas Jafine 4" x 8' Aluminum Duct with 2 Tension Clamps stock number TD48TC.
The ProFlex dryer transition duct is ideal for gas and electric dryer applications.
This duct is UL2158A listed and marked for safe dryer venting and is constructed of heavy duty, fire resistant, 4 ply aluminum foil laminate that encapsulates a high density, corrosion resistant wire helix.