Wide Compatibility Range: The 51 mm blind coffee machine handle cleaning tray is suitable for most standard semi-automatic espresso machines on the market. It can be used in professional bars, busy cafés or , helping baristas and coffee lovers maintain stable extraction and consistent machine performance. Product Size: Each rubber coffee mat backflush tray measures 50 mm diameter and is precisely designed to fit 50 mm /57MM portafilter handles. The compact round shape sits securely in the handle, making backflushing easier while remaining simple to remove and rinse after cleaning. High Quality Material: Crafted from food-grade rubber, this blind insert port filter tray is , environmentally friendly and safe for daily contact with your espresso equipment. The tough yet flexible material resists cracking, deformation and wear, allowing you to use it repeatedly over a long service life. Easy to Use: Specifically designed for cleaning and backwashing espresso machines, this blind disk works perfectly with suitable coffee machine cleaners or backflush tablets. Simply place it in the portafilter, run the cleaning cycle, and it effectively flushes out coffee oil and residue to keep your espresso tasting . Package Content: You receive 2 pieces of coffee mat backflush trays to meet daily and backup usage needs. Having a spare on hand is convenient for multiple machines or frequent cleaning routines. Please carefully confirm the size information before purchase to a proper fit with your espresso handle.