Elbow 90 -18-1/2" Bronze HH, Brass Elbow for Welding-Threading - Water, Heating, Compressed Air, Gas Elbow 90 -18-1/2" Bronze HH, a 15 to 1/2 brass elbow inch for welding-threading, ideal for hot and cold water, heating installations, compressed air and gas. This versatile bronze accessory ensures durability and strength in various applications. Take advantage of its design for female-female connections and enjoy an efficient and long-lasting installation.