Moka rubber seal+ sieve. Function: Fits for espresso pots. rubber seal Material: silicone. Size: cup+sieve/2 cup+sieve/3 cup+sieve/6 cup+sieve/9 cup+sieve/12 cup+sieve. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.