... for mate flange duct and C cleat joint duct 3.High speed,stable Comifo Duct zipper also called duct closing machine, duct seaming machine. ... also be used for a higher pressure. Comifo Duct Zipper, Germanic duct seaming style, allows you to produce the highest ... machine is suitable for mate flange duct and C cleat joint duct manufacture. Combined with Comifo duct manufacture compact lineII/III, hand ...