This ‌high-precision transmission gear box‌ ensures smooth operation of DT82 motorized curtain systems with durable metal gears for long-term reliability. Compatible with standard electric rail end cups, it supports ‌left/right bi parting opening‌ for seamless smart home integration. Corrosion-resistant stainless steel construction withstands daily mechanical stress. Ideal for bulk buyers seeking ‌cost-effective automation parts‌ for curtain track upgrades