Abstract: A nasal filter comprising two filter bodies, a connecting portion and two filter materials is provided. The filter body respectively has a top surface, a bottom surface and a first axial hole. The first axial hole penetrates the top surface and the bottom surface, and a first opening and a second opening respectively form on the top surface and the bottom surface. The diameter of the first opening is smaller than the diameter of the second opening. The connecting portion has two ends connected with the two filter bodies respectively. The two filter materials are respectively disposed in the two first axial holes, wherein the diameter of the filter material is greater than or equal to the diameter of the second opening.

Abstract: An electric wire coupling device includes one or more electric wires having one or more electric cables engaged and received in an outer rubber covering. One or more sockets each has a socket housing, and two conductor members secured in the socket housing and aligned with the socket orifices of the socket housing for receiving plugs. The electric wires and/or the sockets each has an adhesive material for attaching to the supporting wall without further fasteners. The socket may include a side opening for coupling to the other electric wires.