Out of the 3 adapters only one fit correct. The other 2 we're to small to fit over the vent. They would sit loosly inside the vents. When I contacted Fat Fender about this, there tech said I could panel bond them in place or return them. I opted to return and ask for a label. After a few days of waiting and no reply I called to get emails going again. In short they refused to send a return label and I had to return under my own $. I wasted 35 buck to see a lazily made over priced plastic. Refusing to pay return shipping tells me they do not stand behind what the make. This failed transaction reflects shade-tree mechanic mentality. If poor fit and finish is on the little parts, I assume it's that way on everything else. I will never do business with them again nor will I recommend them or products.
Also the website say they are 3d printed, they are not. They are vacuum form sheets.