We have ordered this sealing rings set for our WMF 1000 pro. It fits well and the quality is right. In the exchange, however, should always be taken to ensure that the ring seat is clean. This is particularly important in the brewing unit with the red thick rings. Here like collects coffee grounds and coffee fat, causing a leak. Food contact suitable grease the ring seat should also be greased. This has the advantage that the ring is easier to position and also that the tightness is increased. This fat for coffee machines are also available in a small tube to buy.
