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China Factory 16mo3 Steel Fin Tube, DIN17175 St35.8 St52.3 16mo3 Fin Tube, Fin Tube ASTM A213 T11 T22 T12, Find Details and Price about DIN Steel Fin Tube and DIN17175 Fin Tube from Weifang Luzheng Industry & Trade Co., Ltd. Featuring 15+ Years Manufacturing Experience: Specialized in steel and fin tubes for over 15 years with professional technicians.