Compatibility Designed specifically for many Breville/Baristastyle espresso machines: BES870, BES878, BES880, BES860, BES840, BES810, BES450, BES500 and models 500 / 810 / 870 / 875 / 878 / 880. Sized to match the original felt washer for a precise fit and reliable performance. Material & construction Made from soft, resilient wool felt that cushions moving parts and forms a reliable seal. The material resists compression and helps protect metal components from direct contact, reducing wear over time. Key benefits — why you need this kit Restores smooth, consistent grinding by replacing hardened or compressed felt washers that allow wobble or misalignment. Protects the grinder ring and surrounding components from wear and metalonmetal contact. Reduces unwanted vibration and noise during operation. Keeps your machine operating as intended between professional services, preserving grind quality and extending component life. What's included Kit of 5 individual wool felt washers — ample spares for routine maintenance and multiple replacements. Performance & use Easy to install as a direct replacement for the original felt washer; no modification required. Soft wool provides cushioning and a tight seal without interfering with grinder function. Practical use scenarios Routine maintenance: the felt washer during regular service intervals to maintain consistent grind quality and prevent premature wear. After deep cleaning or disassembly: Reinstall a fresh washer to ensure correct alignment and sealing once parts are reassembled. Troubleshooting noisy or inconsistent grinding: Swap in a felt washer if you notice increased vibration, noise, or a change in grind consistency. Specifications & fit notes Material: Wool felt Quantity: 5 washers per kit Compatibility: BES870, BES878, BES880, BES860, BES840, BES810, BES450, BES500, and models 500 / 810 / 870 / 875 / 878 / 880 Function: Cushions and seals the grinder assembly, replacing the original felt washer for grinding performance this 5pack of wool felt washers to keep your espresso machine's grinder aligned, quiet, and performing consistently between services.