First, the price is supposed to be 8.33 lot 4 blades, and 5.83 when you sign up. Do not make this mistake, because even when I subscribe, the price is 8.33 lot 4 blades. Then the slides are different from those you can buy in supermarkets. Nothing that you will understand because visual on the Hydro 5 upper part of the blade is green. Here she is blue. I do not know where these blades, but they are different from the ones I used to use and also more expensive than expected. This is rare with Amazon.
