The Franklin Machine Products 218-1291 Thermostat Knob is a precisely engineered component characterized by its dimensions of 2-1/4" OD x 2-5/8"W, with a .187"D-stem. Crafted from durable black plastic, this thermostat knob is designed to seamlessly fit and function within a variety of industrial and commercial settings. Introduced after December 2005, this product stands out due to its specific sizing and material composition, making it suitable for exacting applications across multiple market segments such as hospitality, food service, and equipment manufacturing. Its standardized measurements ensure compatibility with a wide range of machinery and appliances, delivering reliable performance and ease of use. The use of plastic not only provides durability but also offers a cost-effective solution for businesses looking to maintain or upgrade their equipment. The Franklin Machine Products 218-1291 Thermostat Knob, with its precise engineering and robust construction, is an essential component for professionals seeking a dependable and compatible thermostat knob for their equipment needs.