Umugqa wokusika ubizwa nangokuthi iyunithi yokuhlinza, umshini wokuhlinza, umshini wokusika ama-strip, nesikele.Isetshenziselwa kakhulu ukusika nokusika izinto zekhoyili ezifana ne-tinplate, i-galvanized iron, ishidi lensimbi ye-silicon, insimbi egoqelwe ebandayo, umucu wensimbi engagqwali, umucu we-aluminium, nomugqa wensimbi.Isika amakhoyili ensimbi abe yimichilo yobubanzi obuhlukahlukene, bese ivuna imichilo ibe imiqulu emincane yenqubo elandelayo.Kuyimishini edingekayo yokusika ngokunemba kwama-transformers, izimboni zezimoto nezinye izinsimbi zensimbi.