The top of the gate is constructed of 1½” x 3/16” mild steel. The ½” rods and ¾” bottom rod are solid steel rods that pass through all uprights for added strength and durability. Uprights are constructed of ¼” x 2” mild steel. All gates can be painted with a variety of color options or left unfinished depending on the requirements. A complete line of hinges and fasteners support a modular system that can be configured to any style of pen design.