... steel tube ball joint stanchions novel, beautiful, convenient to install, sturdy, metal steel railing Ball-connection handrailRijin handrail adopts ball-connection ... . Materials: C = carbon steel; S=stainless steelVIII. Oter Ball-connected Handrail Railing Specification Table SizeOut Diameter of BallOut diameter ... P, C, W, S, SC, SO, MB (Multi ball).2. Types of Inclined Railing include PA, CA, WA, SAL ...