The present invention relates to a sealing member (90) for an inhaler (1) and an assembly comprising the sealing member thereof. The sealing member includes a sealing lip (92). An assembly for an inhaler comprising a first member (3), a second member (25) and a sealing member (90) comprising a sealing lip (92), wherein the first member and the The two members are assembled to allow for relative rotational movement therebetween and the sealing lip is configured to provide a seal between the first member and the second member, To the surface of the member.本発明は、吸入器(1)のための封止部材(90)およびその封止部材を含むアセンブリに関する。封止部材は、封止リップ(92)を含む。吸入器のためのアセンブリは、第1の部材(3)と、第2の部材(25)と、封止リップ(92)を含む封止部材(90)とを含み、第1の部材および第2の部材は、それらの間における相対的な回転運動を可能にするように組み立てられ、封止リップは、第1の部材と第2の部材との間に封止をもたらすために、第2の部材の表面に封止係合する。