This packing nut is designed to fit valves with a stem size of 1/2" and a diameter between 4"-6". It is manufactured by a reputable company known for producing high-quality HVAC products. The nut is made from durable materials that are resistant to wear and tear, ensuring long-lasting performance. This product is an essential component for maintaining the functionality of valves in HVAC systems, making it an ideal choice for service technicians who need reliable parts to keep their clients' systems running smoothly.