espresso machine brewing head backflush disk 100% . Easy to clean. Safe and non-. Need to use with coffee machine. Condition: 100% Item Type: Blind Filter Weight: . 7g / 0.2oz blind pad and a coffee machine handle are provided with a strainer; 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; the brew button, run for about 10 seconds, then turn off; Repeat the above operation about 5 to 6 times at intervals of 10 seconds; Remove the blind film, rinse the coffee handle, and the cleaning process is complete. colour:black Material:rubber size:5cm*5cm*0.2cm Package Contents: 1*Blind filter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.