Shenyang Sideai Door Industry Co., Ltd integrates advanced design, quality management, and after-sales service systems from Canada's SDI Company, utilizing cutting-edge materials and technologies. We specialize in electric industrial doors, including roller shutter doors, high-speed doors, stacking doors, and sectional overhead doors. Our experienced team provides professional installation, maintenance, and repair services for international brands, along with universal mechanical and electrical spare parts to ensure optimal performance. Committed to 24/7 service, we aim to be the leading expert in industrial door maintenance and repair.