Pioneer Part Number: DAA1204. This is forONE original TRIM / GAIN knob for the Pioneer DJM-800, DJM-900Nexus, DJM-2000, DJM-2000Nexus & DJM-S9 Mixers, and the XDJ-RX All-in-one DJ systems. The knob has aGREY rubberised body with aWHITE marker and fit in the Ch1-Ch4 trim positions.
eBay