A metering element (33) for an inhalation device (1) is provided. The metering element comprises a plurality of openings (10) being configured to receive a substance (2), wherein at least one of the openings (10) has a different size than at least one other opening (10). Furthermore, an assembly for an inhalation device (1) is provided. The assembly comprises a metering element (33) with a plurality of openings (10) and a powder channel (16) which comprises an opening (9), wherein an arrangement of the openings (10) is adapted to the shape of the powder channel (16) such that each opening (10) extends into the opening (9) of the powder channel for a different amount.本發明係提供一用於一吸入裝置(1)之量測元件(33)。量測元件包含複數個開口(10),其組構以接收一物質(2),其中開口(10)的至少一者具有與至少一其他開口(10)不同的尺寸。尚且,提供一用於一吸入裝置(1)之組件。該組件包含一量測元件(33),其具有複數個開口(10)及一包含一開口(9)之粉末通路(16),其中開口(10)的一配置係適應於粉末通路(16)的形狀,俾使各開口(10)延伸入粉末通路的開口(9)中達一不同量。9‧‧‧粉末通路的開口10‧‧‧量測元件的開口16‧‧‧粉末通路17‧‧‧粉末通路的壁33‧‧‧量測元件
