Feature:1. Aluminum Alloy: The dial disc is made of aluminum alloy material is more durable and can be used for a long time.2. Prevent Damage to the Knob: Use this dial disc to effectively prevent damage to the knob.3. 10mm Inner Diameter: This is a dial disc with an inner diameter of 10mm, which is suitable for most knobs.4. Application: This dial disc is widely used in rheostats, variable transformer, potentiometers, etc.5. Easy Operation: The dial disc is used to hide the indicator or drive the speed control, easy to operate and install, suitable for replacing the old one.Specification:Item Type: Dial PlateMaterial: Aluminum AlloyModel: BEM-KDPOuter Circle Diameter: Approx. 40mm or 1.57in (There is a 2mm error in manual measurement)Inner Hole Diameter: Approx. 10mm or 0.39inThickness: Approx. 0.5mm or 0.02inScale Size: 0-100Quantity: 200pcsRange of Application: Suitable for RV24YN 20S, RV24YN 30S, WTH118 2W 20S, WH118 2W 20S and Other Potentiometers.Package List:200 x Dial Plate