DIN highly accurate, cold drawn and bright seamless steel tube is used as the tube to be galvanized. The outer wall of tube is electroplated. The caps are covered at two ends of tube to prevent from the dust.white galvanized, color galvanized (yellow galvanized). The outer wall of tube has good property for antirust and anticorrosion. Note: Length for galvanized steel tube should be within 6 Meters.used in hydraulic system, in the occasion where the requirement for antirust and anticorrosion of outer wall is relatively high.