To replace the old knob with the new one, start by carefully removing the old knob from the control shaft. Ensure that you pull it straight off to avoid damaging the shaft. Once the old knob is removed, take the new knob and align it properly with the control shaft. Make sure the alignment is precise to ensure smooth operation. Features -Color:White -Material: -Size:5.00X5.00X2.90cm/1.97X1.97X1.14in -Universal Compatibility:this device is compatible with a wide range of appliances, making it a universal solution for various control needs -Durable Construction: crafted from plastic materials, this product ensures exceptional durability and performance -User-Friendly Operation: featuring an operation and - , it offers a user-friendly and easy experience -Functionality:it's adjusting settings like volume, brightness, and temperature, it enhances the functionality of your devices -Versatile Application: suitable for homes, offices, and industrial settings, this versatile device meets a broad of application requirements Package list: 6 x Timer Control Knobs