I used Anco refills. You need to bring the car to the parts store, along with a measuring device to make sure you get the correct width. (I think the x70 uses "standard width", but I don't remember.) They come with instructions about a small bend you have to make in the holder bracket at one end. The thing about replacing the whole wiper and not just putting in a refill is that, with a non stock assembly, you will lose the little wing that comes on the original part. I assume that it has some benefit for keeping the blade against the glass.