Product Description: 

1.A transverse flanging system used to fix one length of duct to the adjacent length of duct.

2.A duct flange, or duct frame, is used in the air conditioning and ventilation industry to bolt lengths of ducting to each other.

3.Material: galvanized steel or stainless steel

4.Flange size:  20/25/30/35/40mm

5.Flange thickness: 0.7-1.2mm

6.Corner size:  20/25/30/35/40mm

7.Corner thickness: 1.0-1.2mm

Special size upon your request.