The invention discloses magnetic OVP, said pigment consisting of thin-layer flakes having a basic metal-dielectric-metal structure to result in a viewing-angle dependent color appearance, and having, in addition to said viewing-angle dependent color appearance, incorporated magnetic properties, to make them distinguishable from OVP of similar appearance but not having said magnetic properties. The semiconductor substrate may include first signal traces electrically connected to a first row of signal bonding pads and routed on a first layer of the substrate. A user may access the system to create or modify the user’s personal dialing plan by voice telephone call, web interface, or other device, such as a wireless application protocol phone or wireless personal digital assistant. The second group of golf clubs desirably comprises a plurality of club heads each having a main body of higher density metallic material than the density of the metallic material of the main body of each of the heads of the first group. The displacement ratio of the pump and motor, connected to these two members, controls the ratio of the IVGT. According to the invention a rear housing part is provided for shielding between the intermediate portions ; said rear housing part a) receives the intermediate portions, b) separates the same from each other in said rear housing part by continuous partition walls, and c) the rear housing part is provided with a metallization layer for shielding.