Summary: Lavi's glass cap rail is 316 stainless steel channel tubing that fits over the top edge of a glass railing panel to form a continuous top rail. The tube has a 1.67-inch outside diameter and a 0.94-inch channel, and comes in 16-foot lengths in polished or satin finish. Matching 316 fittings with threaded screw bosses keep the line flush: horizontal and vertical flush elbows, a splice, and an end cap. Components are stocked and shipped from San Antonio, Texas.