We are a manufacturer specializing in sign post,including galvanized square tube, u channel post,round post and sign blank Delivery ... to:USA,CANADAGalvanized Steel Square TubeSquare Sign Post:Steel plate: ASTM A1011 or ASTM A653 ... strength of 100,000 psi.Dimensions: Available in 7-, 8-, 10-, 12-, 14- and 16-foot lengthsAluminium alloy Post Primary Competitive ...