Wohler USA Inc. develops and manufactures cleaning tools for chimney stacks, flue-gas systems, ducts, pipework, and ventilation systems. Wohler Vipers and Wohler Rotary Viper Vents easily navigate sharp turns. And their durable GRP (glass fiber reinforced plastic) rods are built to last. Wohler's threaded brushes and stars come in a variety of materials and sizes to help you tackle large and small cleaning jobs. We also offer compressed-air cleaning sets, ideal for cleaning ventilation pipes.