For Tektronix DPO MSO MDO TDS-BC Series Oscilloscope Knob Cap Scaling Knob
L Types: One Small Knob/One Middle Knob/One Large Knob/One Set Of Zoom Knob One Button Shuttle/Middle Knob Plus Plastic Ring(Optional). l One Set Of Zoom Knob One Button Shuttle. l One Small Knob. l One Middle Knob.