ONORTHBROOK, Ill., May 13, 2010 -- Underwriters Laboratories (UL) is notifying AHJs, electrical contractors, electricians and retailers that the Electrical Metallic Tubing (EMT) products, manufactured by Guangdong Walsall Steel Pipe Industrial Co., Ltd. and identified below, may not be adequately protected against corrosion. These products display a UL Listing Mark for the U.S. and Canada, however, products purchased at retailers and distributors were found not to comply with United States or Canadian safety standards and are not authorized to bear the UL Mark. Details