Replacement 10K lin dual slide potentiometer.

Value commonly marked as B103 or B10K.
 
Slider / Potentiometer fits Pioneer DJM400 500 600 and 800, and may fit other mixers. 
 
Please check that the fader(s) being replaced are the correct value as this replacement (10K ohms) and the correct size for your mixer as well as the same number and arrangement of pin contacts.
 
Pictures are of the actual slider that you will receive.

It also fits the Yamaha Clavinova CLP 550 electronic organ as the following message received from an eBay member shows -

" Received the item the other day, fitted perfectly with a shortening of the slider tag. So I thought I would let you know in case you want to add it to your advert, it fits the Yamaha Clavinova CLP 550 electronic organ and the volume works as it should."