Models 800 HC and 800C HC offer the safety and security of a rolling service door, with the added benefit of a cycle life 25 times more than our standard service door and the ease of maintenance that comes with an innovative springless design. With a 500,000 cycle life, Models 800 HC and 800C HC are ideally suited for applications requiring a strong and durable rolling service door. These doors offer a variety of insulation, airflow, and weather seal options. High cycle rolling doors are ideal for high traffic areas requiring long-lasting durability.