... 3.ISO9001:2000 4.Durable,aesthetic outlook,ISO Galvanized Ball-joint handrail:1.Usage: used in water ... middle),used in low and many contruction platform fence post (2)higher H=1100(ball middle), ... used in middle and high contruction platform fence post (3)three H=1200(ball middle),used ... tread stair plate5.Advantage: this ball fence post is hot dipped galvanized,anti-rust, cheap and practical,easy ...