... :7-30days 4.Availability:20,000tons/year Wanjie ball-joint handrails are well featured by attractive appearance, easy installation, sturdy ... Application: widely used for Power plants, chemical plants, oil refineries, steel mills, paper mills, mechanic plants, cement plants, municipal engineering, ... :mainly four kinds as 1000,1200,1500,2000mm.4.Steel tube's size:subject to the design drawings confirmed ...