Black Phosphated Tube Description To protect the surface of NBK in a very good condition,we alsways use Black Phosphated. We have many experience in Black Phosphated and NBK tubes,as we said,we are just in exporting seamless steel tube,different kinds,different process, supply products and service better and better. .......... For more details and products, please feel free to contact us. KWK Steel Co.,Ltd Tel:+86-576-88808821 Fax:+86-576-88809380 Email:culture007@gmail.com Http://www.kwksteel.com Address:E813,Xintai Square Building,Jiaojiang District,Taizhou,Zhejiang,China
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