Features: brand new and high quality Made of high-quality materials durable The knob is a manual element with manual control. Can control the effects of various functions For example level speed sound etc. Can be used for synthesizers electric guitars etc. Product parameters: Material: plastic metal Colour: Black Counting plate range: 0-100 Knob size: 27x14mm Counting dial size: 41mm Suitable for: 6mm shaft Package Included: 10 *hat 10 * Dial Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data.