Aluminum F Flange is one of the main part of the fabrication of the phenolic air duct,it played a great role in connecting panels.The function of the Aluminum F Flange is allowing fasteneing all parts with the fastening frames higher than 20mm to the duct..About the package,normally it will be cutted in 4 meter long,80 meter per bundle and be packed by plastic film.For Pre insulated phenolic duct used.

Product Features:

1.Thickness:20mm/30mm.

2.Length:4mtr length.

3.Specially for phenolic ductwork used.