Blind Filter Rubber Disc Backflush for Semi-Automatic Coffee Maker Portafilter Purification DeviceFunction:1. Adopts high quality rubber, easy to clean, safe and non-toxic.2. Practical coffee accessories, suitable for Espresso semi-automatic coffee machine.3. Perfect Halloween and Christmas after choosing a gift for your coffee lovers.4. Compact size, lightweight, suitable for most standard portable filters.5. Easy to install, can directly replace the old or broken one. Specification: Item type: blind filter Material: rubber Color: as shown in the picture Product size: approx. 50 x 2 mm / 1.97 x 0.08 in Weight: about 6 g / 0.2 oz How to use 1. The rubber pad and handle of the coffee machine are equipped with a mesh filter2. Put a blind piece into the end of the coffee machine holder, then put a spoon of 3 to 5g of special coffee cleaning powder or special coffee cleaning tablet.3. Press the brew button, run for about 10 seconds, then turn off.4. Repeat the above operation about 5 to 6 times at intervals of 10 seconds.5. Remove the blind film, rinse the coffee holder, and the cleaning process will be completed. Package List: 1 x Blind Filter Note: 1. Please allow 1 - 2mm error due to manual measurement. Thank you for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be slightly different from the actual object. Please take the real one as standard.