I have for the second time bought now the wipers from Bosch for my Smart 451 and the wipers would buy again at any time. The assembly of the wiper designed himself with two left hands very simple and is done within a few seconds. Particularly positive I like about the wipers that they are a few centimeters longer than the original wiper Smart, whereby a larger area of the disc is cleaned. Added to this is still the positive effect that the replacement wiper from Bosch are a lot cheaper than the original spare wiper on the smart shop, so definitely recommend only.