Features:This potentiometer knobs are made of plastic materials. It is used to control the volume and serves as control switchPotentiometer Rotary Knob is useful for connect the rotary potentiometer, usually multiturn linear potentiometer which always use as volume control switchA type potentionmeter volume switch, clockwise and anti clockwise rotary controlSpecificationsColor: Red+Yellow+White+Orange+Blue(2 Pcs each color)Size: 15 mm x 17 mmQuantity: 10 Pcs/1 SetNote:Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bidDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Contents: 10 Pcs x Rotary Knobs