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