The AllPoints Foodservice Parts & Supplies 221638 is a thermostat knob designed for precise temperature control in commercial ovens. This knob operates within a temperature range of Off to 200-500°F, ensuring optimal cooking performance. It is specifically compatible with the 541179 oven model and fits securely over the built-in knob of the 541179 control. Constructed for durability and ease of use, this replacement part enhances the functionality of Garland ovens, making it an essential accessory for efficient food preparation.