ガフ 3 It seems to work, but there are noticeable differences in design. Material feel and elasticity respond differently from the original brushes too, and I fear these will perform worse. The originals are considered world class brushes. So I doubt these changes are for the better.One big destination is that the gry plastic piece on the brushes are rolling with more friction, and in the light green brush, the original has a foam layer inside, damping the brush, but still providing resistance when pushed. Also making the deformation more even. That is not at all here. And there are points inside that are far harder and points that are far softer.Considering these Brushes. I can't help but lose faith in the filters too. I don't know how well they will keep the promised filter efficiency, and for how long that will be true. And it is almost impossible to test as a consumer. So there is no telling. And I have a feeling the manufacturer knows that.See photos to see the foam in the original, vs the hollow inside of these.(the outside shape of the original is different because it is used and worn-out)