This is a pair of Villex hum cancelling pickups that I intended to put into one of my 5 string jazz basses but I have now changed direction so these are up for grabs. They are both the same size and I believe they will work just fine with 17mm, 18mm or 19mm string spacing. There is some minor wear on the tops of the covers but they are in very good shape. I will include a Villex wiring diagram. Thanks for looking!