Magnetic Windings, a longtime manufacturer that once employed hundreds of workers, sold its facility in Palmer Township for $3.4 million. Amy Hawley, a broker with SVN Imperial Realty of South Whitehall Township, represented AMERCO Real Estate Co., the real estate division of U-Haul International, in its purchase of the property at 2711 Freemansburg Ave. near Easton. The sale includes the 87,000-square-foot industrial facility and the nearly five-acre tract of land where the facility sits.