Cable Ferrite, for noise reduction

Stepper motors are electrically noisy! I didn't need for these, but some customers have reported random errors that went away by installing some of these or similar. Depending on the cables you use, your grounding scheme, your computer and your environment in general, you might need some of these.

Cable tie is included. 

If you decide to use these, install  these to both ends of a cable. Unless your USB cable already has ferrites, I recommend using these. You might want to have these on camera cables as well. For an overkill solution, on motor wires as well:

Max. cable diameter 7mm. 

Note: This is Farnell/Element14 part 1301648. My price is not very good; if you regularly buy from there, you save some money by getting these from there, I offer these as a convenience only.