Mini N20 Full Metal Worm Gear Motor 22RPM Slow Speed Right Angle Shaft for DIY 3D Printing Pen DC 3.7V 4.2V 5V Gear Reduction Mo

Mini N20 Full Metal Worm Gear Motor 22RPM Slow Speed Right Angle Shaft for DIY 3D Printing Pen DC 3.7V 4.2V 5V Gear Reduction Mo

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