1.ISO9001:2008 quality systems 2.4 running lines. 3. Delivery:7-30days 4.Availability:20,000tons/year Wanjie ball-joint handrails are well featured by attractive appearance, easy installation, sturdy and durable, excellent anticorrosion performance after galvanized surface treatment. Application: widely used for Power plants, chemical plants, oil refineries, steel mills, paper mills, mechanic ...