Need to use coffee machine when using. Features:  1. 100% brand new and high quality. 2. Easy to clean. 3. Safe and non-toxic. 4. High quality rubber. 5. Need to use with coffee machine. Specification:  Condition: 100% Brand New Item Type: Blind Filter Material: Rubber Color: Black Size: Approx. 50 * 2mm / 2 * 0.08in Weight: Approx. 7g / 0.2oz Package list:  1 * Blind Filter Instructions: 1. A rubber blind pad and a coffee machine handle are provided with a strainer; 2. Put the blind piece into the tip of the coffee machine handle, and then put a spoonful of 3 to 5g coffee machine special cleaning powder or a 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 handle, and the cleaning process is complete. Features High-quality materials:This blind filter is made of high quality rubber,safe and non-toxic. Easy to clean:This blind filter is easy to clean . Size:The size of this blind hole filter is approx. 50 * 2mm / 2 * 0.08in. For use with:This blind filter needs to be used with a coffee machine. New:This blind filter is brand new and high quality.