The listing for sale is a replace knob
OEM, good quality, soft rubber
Fit for : Native Instruments Traktor Kontrol Z1 Z2 S2 S4 S5 S8
Allen & Heath XONE DB2 DB4 92 23C
Pioneer DDJ-SX S1 T1 SB SR RX SZ WEGO ERGO
Pioneer  XDJ-RX R1 RZ AERO DJM-T1 S9 and other DDJ, XDJ, digital DJ machine.
Also fit for : Numark, VOXOA , Vestax mixer machine.
Not compatible with Pioneer DJM series machine
Please tell me the color and quantity you need , otherwise the default delivery
4x blue
4X Red
4x white
4x green
4x orange
4xblack
4x Purple
4xGray
4xYellow
Quantity : 36 pcs

Note:Aftermarket part not original