The GRI Industrial Wide Gap Model 4400 Overhead Door Surface Mount Alarm Contact is a high-quality commercial door hardware designed for industrial use. This unit, made of aluminum and steel, is suitable for commercial and industrial applications and features a surface mount design. With a sleek silver color and a pack containing 1 set, this overhead door contact alarm is manufactured in the United States by GRI, a trusted brand in the industry. Perfect for ensuring security and safety in commercial and industrial settings, this alarm contact is a reliable and durable choice for businesses seeking peace of mind.