This pack of 10 Imperial duct hoses is perfect for your HVAC and refrigeration needs. The hoses are made of durable galvanized steel and have a round shape with a diameter of 4 inches. Each hose is 24 inches long and features a snap lock for easy installation. The model number is GV0357 and the brand is Imperial. These duct hoses are ideal for use in business and industrial settings and are sure to provide a reliable and long-lasting solution for your HVAC and refrigeration needs.