And if your are looking to fit used oem S4 blades make sure you have a good look at the metal retaining hardware on them, they rust , in turn expand due to corosion and then distort the ABS back section .
I bought my set from a guy in germany for a lot less than normal used prices , still a lot for what they are but not the silly prices ebay ones are.
I had to rebuild one but I knew that when I bought them.