Upper and lower stainless steel screens (each 3 pc.) with mesh used at the bottom of the filling chamber and on the filling chamber insert. The fine tighter mesh width is used for applications where the normal mesh width is not sufficient i.e. very finely ground herbs. Set includes additional nut and washer. 3 pc. lower screen (without hole) 3 pc. upper screen (with hole) 1 pc. Washer 1 pc. Nut (M2)