1:Parameters for Galvanized Z Section Purlins Z Shaped Steels Product NameZ Purlins/Z Sections/Z Channels/Z-shaped SteelCapacity100000 pcs/monthCertificateISO9001~14001MaterialQ235/Q235B/Q345/Q345B/SS400TypeChannel SteelSurface treatmentPolish;Painted;Galvanzied;PunchedPaymentL/C at sight,30%...