Very fast delivery. However the pads were sealed in original bag for headphones and not pads ... The manufacturer's specifications are not verifiable. Diameter measured 17-18 mm flat, narrow opening, but the foam is extensible. To be implemented carefully and kneading foam, hugs the contours of the ear. Suitable probably most common headphones, but more suitable for smaller diameter headphones, because the diameter is not everything, we must take into account the thickness of the earpiece. More stretching the foam, the more it will be fine and will be weakened. Quality comparable to that commonly found in supermarkets. Longevity, to do with time, but given the price and the free port, so do not deny it. For my usage, rather it is a good buy.
