These are direct replacement for the plastic Titan idler lever on Artillery printers.

They will fit the Evnovo/ Artillery X2 - Gpro - X1 - Genius

They should fit all other versions of the Titan extruders. Black or Silver

When changing the idler lever ensure that you take off the original idler lever bearing from the motor shaft. There can be only one.

Also use the original Artillery idler spring and grooved bearing from the plastic arm.

To get the bearing out knock the pin through.

https://www.facebook.com/happy3dartillery3dspares/