The AllPoints Foodservice Parts & Supplies 221087 T'Stat Knob is designed for reliable performance in commercial fryers. With a diameter of 2-3/8 inches, this knob features an off setting range of 375-225 degrees and a mounting hole of .187 inches. The flat down design ensures easy operation, while the "Off" label printed on the bottom provides clear visibility for users. Compatible with Wells fryers models F(49, 67, 68, 676, 678, 686) and Fls49, this knob is part of the Llf series, making it an essential replacement part for maintaining optimal fryer functionality.