Be sure to add me to your favorites list New Yamaha DJX 2 / DJX II / DJX / PSR-D1 / CS1x / CS 2x Replacement Parameter Knob / Dial, Black Version. This is a new, just out of package condition, replacement knob / dial for the Yamaha DJX II keyboard, but it will also fit the original blue-colored DJX (also called the PSR-D1) perfectly. It's one of the real-time control / parameter control knobs / dials that this keyboard has (also the sampling volume control uses this type as well). This same knob is also used for the CS1x and CS2x analog modeling synthesizers as well. Unfortunately, these are very easily lost, so here's a brand new replacement for your synth! This is in brand new, never used condition, and will fit right onto one of the stems on your DJX, DJXII, CS1x or CS2x, replacing a lost controller dial / knob. This replacement knob is black in color, as was used on the later models, but it's the exact same type as the white ones used on the original DJX, so it will just fine for that one too. The CS1x comes with knobs just like these, and they will also work fine to replace the original blue knobs of the same type on the CS2x. I have several of these available and you can get one or more! Thanks for looking, Check out my Store!