Clean Your Espresso Machine -- To get the best shot of espresso every time, your machine needs to run smoothly. Regularly backflushing the valve system will help maintain optimal coffee flow. Use our cleaning disc compatible with select Breville espresso machines with a tablet to get the job done (tablets not included). Exact Fit For -- Impresa’s blind espresso disc is precision cut to fit Breville models - Duo-Temp Pro, the Infuser, the Barista Pro, The Barista Touch, The Barista Express and more (BES810BSS, BES840XL, BES878BSS, BES880, BES870XL...). With a diameter of 54mm, it may work with other espresso machines as well