The AllPoints Foodservice Parts & Supplies 221111 Control Knob & Dial is designed specifically for Mark Time Timers. This timer knob features a double D-stem with dimensions of 3/16" x 1/8", ensuring a secure fit and reliable performance. Its durable construction provides long-lasting use, making it an essential replacement part for maintaining the functionality of your timer. Easy to install, this knob enhances the usability of your equipment, allowing for precise time adjustments.