Mirror Polished Stainless Steel 90 Degree Handrail Elbow Connector for Round Tubes Winsco stainless steel 90 degree handrail elbow is designed to connect round tubes and create a smooth right-angle transition in handrail, railing and balustrade systems. Its polished surface and clean curved profile provide a secure connection while maintaining a professional architectural appearance. This round tube elbow connector is available in SUS 201, SUS 304 and SUS 316 stainless steel.