NOTE:
1.This will need to be soldered to the PCB, this requires the unit to be dismantled, we strongly recommend that this item is fitted by suitably experienced and qualified service technicians.
2.These are not original ones, but they will be good replacement ones.

This is for ONE replacement Channel Fader suitable for the Pioneer  DJ Controllers.
There are two choices. Look at the machine model: DDJ-SX and DDJ-SX2 are not universal. 

01: XDJ-R1 DDJ-SX SR vertical fader number: 418-S1-701-HA
02: DDJ RX SX2 SX3 vertical fader number: 418-S1MK2-725