... base 3.ISO9001:2000 4.Durable,aesthetic outlook Galvanized ball post:1.Usage: used in water factory,dirty ... chemical plant,petrifaction enterprise.2.Specification: NO. Post dia ball dia handrail dia rai dia tread plate HL1 ... base--tread stair plate5.Advantage: this ball fence post is hot dipped galvanized,anti-rust, cheap and practical, ... , wide usage,easy to maintenance Galvanized ball post( factory)