The present invention relates to a novel ester-based plasticizer, and, more particularly, to an ester plasticizer, which is synthesized by esterifying a polyhydric alcohol and an alkylene oxide with an aliphatic carboxylic acid or an aromatic carboxylic acid. Pixels of the input video are partitioned into sets of pixels, wherein the pixels in the sets are adjacent, and for each set of pixels performing the following steps. Mechanical hook-like rotary pawls supplement the action of the magnets. A biasing mechanism acts to bias the outer piston in an unactuated position unless a force is exerted on the outer piston that is greater than the biasing force. The rotor is preferably composed of a first material such as steel or cast iron, and the hub section is preferably composed of a second material such as aluminum or magnesium that is lighter by volume than the first material.