Curtain rods and accessories. This connector is used for glass shower door support rods, connecting the support rod to the glass door. The tubing is 30*10mm in diameter, flat, and made of 201/304 stainless steel. A variety of sizes and styles are available. Finishes include satin nickel, chrome plating, matte black, gold, rose gold, and electrophoretic black. We typically use spray painting, electroplating, and PVD finishes.