36mm 12V Low Rpm High Torque DC Planetary Gear Motor with Encoder - China Gearmotor, Gearbox | Made-in-China.com
12v DC Gear Motor High Torque 100- 3000 RPM (8mm) - ZHAOWEI
12V 24V Mini Geared DC Motor With Encoder Model NFP-JGB37-3530-EN | Micro DC Motors
Amazon.com: DC 12V Electric Gear Motor High Torque Speed Reduction Motor 15/30 / 100/200 RPM with Centric Output Shaft 4mm Dia for RC Car Robot Model DIY Engine Toys (200 RPM) : Toys & Games
JGB37-520 DC Gear Motor 6V 12V 6~1590rpm Hall encoder with speed measurement | eBay
12V/17.3Kg-cm/18RPM 139:1 DC Gear Motor - 3268_1 at Phidgets