This vintage ZURN hydrant key valve knob is a must-have for any collector of firefighting and rescue memorabilia. Made of durable aluminum, this knob features a 3/8" square wrench for easy operation. It was manufactured in the United States and has no signature. The knob's design is reminiscent of the early days of firefighting, making it a unique addition to any collection. Whether you're a firefighter, history buff, or simply appreciate the craftsmanship of vintage items, this ZURN hydrant key valve knob is sure to impress.