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Size: Seamless elbow: 1/2"~24"DN15~DN600 Welding elbow: 6"~72" DN150~DN1800 Wall Thickness: sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, sch5s, sch20s, ...