Genuine OEM replacement knob for the EQ Hi/Mid/Low on CH1,2,3 or 4 on the AlphaTheta XDJ-AZ and the Pioneer DDJRZ, DDJRZX, DDJSZ, DDJSZ2, DJM2000, DJM2000NXS, DJM800, DJM850, DJM900NXS, DJM900NXS2, DJM900SRT, DJMS9, SVM1000, XDJRX, XDJRX2, XDJRX3, and XDJXZ.