... convenient to install, sturdy, durable, maintenance Ball-connection handrailRijin handrail adopts ball-connection and surface treatment of hot-dipped galvanization ... C = carbon steel; S=stainless steelVIII. Oter Ball-connected Handrail Railing Specification TableSizeOut Diameter of BallOut diameter of pillarOut ... , C, W, S, SC, SO, MB (Multi ball).2. Types of Inclined Railing include PA, CA, WA, ...