... the post 2.Customized, with or no base 3.ISO9001:2000 4.Durable,aesthetic outlook,ISO Galvanized ... chemical plant,petrifaction enterprise.2.Specification: NO. Post dia ball dia handrail dia rai dia tread ... stair plate5.Advantage: this ball fence post is hot dipped galvanized,anti-rust, cheap and practical,easy ... , wide usage,easy to maintenance galvanized steel ball-joint post( ISO 9001 factory)