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 aluminium foil laminate that encapsulates a high-density, corrosion-resistant wire helix. This forms an air-tight and easy-to-use air duct. This duct will not support combustion.