Product Name: Duct Hardware Flange No. 20 25mm Model NO.: NO. 20 Manufacturing Way: Casting Sealing Surface: TG Connection: Flanged Structure: Flanges Material: Galvanized Iron Type: Welding Flange Trademark: chinafore Transport Package: Carton Specification: NO. 20 Origin: China Product Description Size H (mm) G (mm) L (mm) No.20 25 0.7 20 No.30 40 0.8 40 Our advantages:1)We have a team of excellent designers who are well-versed in the styles and tredns of high quality products we are specilized in.2) We have our own factory with very competitve price3)More than 10 years' experience in producing HVAC Parts4)Good service and reputation5) Large production line