farr air pollution control provides the toughest, best built dust collectors and replacement cartridges in the industry. farr gold series® industrial dust collectors feature a modular design for easy maintenance. hemipleat® patent pending cartridge design with state-of-the-art pleating technology promises numerous and valuable benefits to end users of dust collection equipment, including reduced energy costs, improved performance, and longer life. state-of-the-art pleating technology is the key to the hemipleat?s superior performance. gold series dust collectors have been used in hundreds of applications including mining, pharmaceutical, blasting, laser and plasma cutting, welding, chemical processing, fiberglass, food processing, seed processing, woodworking, paper scrap and rubber grinding. contact us toll free at 800-479-6801 or locally at 870-933-8048