[Excellent Material] The product is made of high quality material, durable and long lasting. [Lightweight and Portable] 31mm high quality copper tube motor, small size, large pair [BALL BEARING DESIGN] Ball bearing design improves shaft wear resistance [Excellent Performance] All metal gears are impact resistant, have a long service life and low noise. [Scope of application] Generally used in curtain machines, advertising equipment, window openers and smart devices., Weight: 0.7936641432 pounds, Manufacturer: Nobrands