Abstract: A key includes a blade, a bow formed on an end of the blade, and an ornamental member mounted in a hole of the bow. A transparent casing accommodates the bow and thus retain the ornamental member in the hole of the bow. In another embodiment, the hole is delimited by a bottom wall, and a transparent lid is force-fitted in the hole that receives the ornamental member and thus retains the ornamental member in the hole. The key may be used as an ornament in addition to its original utility. The ornamental member can be replaced by the user with a desired one at any time when desired.

Abstract: A key includes a blade, a bow formed on an end of the blade, and an ornamental member mounted in a hole of the bow. A transparent casing accommodates the bow and thus retain the ornamental member in the hole of the bow. In another embodiment, the hole is delimited by a bottom wall, and a transparent lid is force-fitted in the hole that receives the ornamental member and thus retains the ornamental member in the hole. The key may be used as an ornament in addition to its original utility. The ornamental member can be replaced by the user with a desired one at any time when desired.

Abstract: A fuel filter includes a housing, a filtering element mounted in the housing, the filtering element including a hollow central portion surrounded by a filtering arrangement, and a material for emitting far-infrared rays for activating fuel molecules passing through the filtering filter. The fuel molecules are activated by far-infrared rays when the fuel is passing through the filtering arrangement that removes undesired substances from the fuel. The combustion efficiency of the resultant fuel/air mixture in a combustion chamber of a cylinder of a vehicle is excellent.