SUPERFLEX 12″ DUSTING POM EXTENSION DUSTERS. Extension Dusters are the easiest way to reach high, out of the way places. The Flex models offer extra convenience to get over and around the most difficult to reach surfaces. The head and shaft on the Flex models are completely flexible and virtually unbreakable. Manufactured from polypropylene fibers. 2 stage extension to 58″, with flexible head.