Interesting, the opposite shape of my 250 SL with original blades (part that holds the refills). Mine refills are not pyramid shape like yours, the widest point is at the top, almost 10mm. Thanks for the info. I had success buying the Trico 47-800 refill (8mm) and bending the claws of the blade inward to hold them. $6.99 for two refills long enough to make 4 for the car.