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12V Tiny DC Worm Gear Motor w/ Dual Shaft, 381RPM - RobotShop
Worm Gear Sets - Framo Morat - USA
Micro Worm Gear Reducer Brush DC Motor, Stable Transmission Torsion, High Temperature Resistant, 3 Layers of Molecular Paint, Mainly Used for Electronic Locks, Smart Cars (DC3V: Amazon.com: Tools & Home Improvement