Stainless Steel Handrail Tube Connector - Grade 316. This connector is designed to connect 1.66" diameter stainless tubing, available in both grade 304 and grade 316. It provides a secure and reliable connection for joining two pieces of handrail tubing together. To ensure a strong bond, we recommend using E4584 Adhesive (sold separately). This connector is a versatile solution for creating seamless and sturdy handrail installations.