Motor with 25 mm diameter and 56 mm length, 172:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 31 RPM speed and 13 maximum torque. Pololu 3256

Motor with 25 mm diameter and 56 mm length, 227:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 23 RPM speed and 17 maximum torque. Pololu 3257

Motor with 37 mm diameter and 50 mm length, 6,3:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 1600 RPM speed and 3 maximum torque. Pololu 4747

Motor with 37 mm diameter and 50 mm length, 10:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 1000 RPM speed and 4,9 maximum torque. Pololu 4748

Motor with 37 mm diameter and 52 mm length, 19:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 530 RPM speed and 8,5 maximum torque. Pololu 4741

Motor with 37 mm diameter and 52 mm length, 30:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 330 RPM speed and 14 maximum torque. Pololu 4742

Motor with 37 mm diameter and 54 mm length, 50:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 200 RPM speed and 21 maximum torque. Pololu 4743

Motor with 37 mm diameter and 54 mm length, 70:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 150 RPM speed and 27 maximum torque. Pololu 4744

Motor with 37 mm diameter and 57 mm length, 100:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 100 RPM speed and 34 maximum torque. Pololu 4745

Motor with 37 mm diameter and 57 mm length, 131:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 76 RPM speed and 45 maximum torque. Pololu 4746

Motor with 37 mm diameter and 57 mm length, 150:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 67 RPM speed and 49 maximum torque. Pololu 2829

Motor with 37 mm diameter and 68 mm length, 19:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 530 RPM speed, 8,5 maximum torque and 64 CPR encoder. Pololu 4751