Shaft Size = 4mm Knob Diameter = 11mm Knob 높이 = 16mm Body 색상 = Black Indicator 색상 = White For Use With = Potentiometer Material = Plastic Slider Knobs. An RS Brand black wedge-shaped slider knob with a white positioning line. With a 1.2x4.0mm shaft size, this type of knob is typically used with sound mixing desks and similar slide potentiometer applications.