The invention provides a jacket assembly (2) for a cartridge (40). The jacketassembly (2) is adapted to be received by a dispensing device (38). The jacketassembly (2.) comprises a body (4) having a first end (8), a second end (10), anda wall (12) extending therebetween. An alignment member (14) is located on thewall (12), the alignment member (14) being substantially rectilinear in shape.Particularly, but not exclusively, the invention relates to a jacket assemblyfor an aereosol cartridge, for use in a device for dispensing a fluid for fragrancing,deodorising or sanitising air. According to a further aspect of the present inventionthere is provided a jacket and refill cartridge assembly； a dispensing deviceadapted to receive a jacket assembly； a dispensing device assembly comprisinga dispensing device, a jacket assembly and a refill cartridge； a dispensing deviceadapted to receive a jacket assembly and refill cartridge.
