Application: For Zebra,Shangri-La,Roller blinds Compatible with Φ38MM tubes and Φ4.8MM × 6MM ball chain. Performance: testing of over 10,000 cycles. Pull-down≤1KG, lifting≤2.7KG, 5KG maximum load capacity. Structural&Material: Made from PA66+GF high-performance plastics; 6 planetary gears inside; 1:1.7 reduction ratio,energy saving up to 35%.