[Update configuration files]The cleaning disk are exactly the same as the latest accessories of the for coffee machine.There is no water outlet in the center of the latest accessories, don't worry, there is a backflow device inside your machine. [Clean Your Espresso Machine]Keeping your espresso machine clean is essential for get the of espresso every time. This backflush disk is a effective solution to help your maintain optimal coffee flow. [Widely Compatible]This backflushing disc, providing a wide range of compatible devices: for BES870XL BES860XL BES840XL BES450 BES500 BES878. BES880, GRUPPO , SPAZIALE, SAN , WEGA Colour:black Material:Silica gel Package Contents: 4 * Cleaning Disc Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.