A connector for an electric apparatus has a case and a base which are engaged to each other or integrally formed. Each of the columns comprises a cellular structure that includes a plurality of elongated tubes having a variety of cross-sectional shapes extending from the base to the top of the column. A base-member side face of each light-blocking blade is supported by the base member. Etchant etches the metallized surface into an item specific pattern using subsequently applied etchant that exposes the metallized surface devoid of the etchant-resistant mask. A desired power consumption estimation is based on a desired voltage and a desired frequency while a power density is power used in a certain area. The abdominal portion, lumbar portion, hip portion, inner leg portions, and compression leg portions are manufactured in a single unitary piece of graded knit of at least two different yarns and knit patterns.