Check the listing for details. 5Pack Potentiometer Control Knob ABS Guitar Knob 270 Degrees D Type Black White. Condition: New. Listed at 10.47 USD. What is this?Potentiometer knob is an important accessory for connecting potentiometers,fit for 6mm D type Shaft and can be used for electric guitar, bass, audio,amplifiers,volume control, etc.What will I get?Potentiometer Control Knob ,is in size of:Height:17mm(0.66 inch)Outer diameter:12.5mm(0.49 inch)Inner diameter:6mm(0.23 inch)Color:Black WhiteMaterial:ABSButton rotation degree:270 degreesIn the package of: 5 x Potentiometer Control KnobIs there any advantages of the product?It is made of ABS material,which has high reliability and durability. Button beautiful appearance, small size, easy installation, suitable for a variety of different electronic equipment and occasions. How to use it?Steps of using:1. Confirm the potentiometer model; 2.