... plate, marks "A"; no plate, not marked.III. Quantity of horizontal pole:1.one horizontal pole; ... post; 2. two posts(pillar)VI. Specification: S means standard type; E means economical type. Please ... below. VII. Materials: C = carbon steel; S=stainless steelVIII. Oter Ball-connected Handrail Railing Specification ... parties. Rail Types1. Types of Vertical Railing include P, C, W, S, SC, SO, MB (Multi ...