
Factory Rolling Shutter Door Steel for Units. Long-lasting Torsion Spring: Life time 20,000 cycles for reliable operation. Customizable Door Colors: Available in Black, White, Red, Blue, Orange, Dark Grey, and other custom colors. Multiple Opening Methods: Supports manual, electrical with remote, wifi, and wall switch options. Durable Steel Construction: High strength steel curtain with anti-theft and anti-destructive performance. Factory Pre-assembly: Door pre-assembled with predrilled holes for easy installation. Comprehensive Warranty: 3-year warranty coverage for mechanical defects. Certified Quality Standards: Certified with CCC, ISO9001, and CE standards. Professional OEM Service: Full customization and OEM services available for various projects.