S/M/L Scaling Knob Cap For Tektronix Oscilloscope DPO MSO MDO TDS-BC Series
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 Small Knob. l One Middle Knob. l One Large Knob. l One Set Of Zoom Knob One Button Shuttle.