[Six-layer thickness]:The Dryer Vent Hose is made of 6 layers thickness(2 Aluminum Foil +2 PET +Steel wire+ PVC),The hose steel wire diameter is 1mm prevent deformation.The PVC film help to be light-proof,noise reduction and Insulation. [Ducting parameters]：TEAIERXY 4 inch dryer vent can be 360°...