3-12V N20 Small Electric Metal DC Gear Motor with Reduction Gearbox M3 M4 Screw 3mm 4mm Shenzhen OT Technology Co., Ltd. Base Info Description Pre：Factory Price Carbon Steel Large Diameter Forged Spiral Internal Spur Ring Gear Inner Next：DC12V N20 Micro Metal Gear Motor N20 N30 Gear Motor 20-50rpm with Gearbox for Door-Lock
