The AllPoints Foodservice Parts & Supplies 221620 is a high-quality thermostat control knob designed for reliable performance in commercial kitchen equipment. This black indicator knob features a diameter of 1-7/8 inches and a 3/16-inch D-stem with a flat down design, ensuring a secure fit and easy operation. It is compatible with various Alto-Shaam models, including the 1000-Bq2/128, 1000-Bq2/192, 1000-Bq2/96, 1000-S, 500-S, 750-S, and 750-Th-II. Upgrade your equipment with this durable and efficient control knob for precise temperature management.