Motor with 25 mm diameter and 48 mm length, 9,7:1 metal gear, 12 V  operating voltage, 0,1 A to 1,1 A power consumption, 560 RPM speed and 1 maximum torque. Pololu 3250

Motor with 25 mm diameter and 50 mm length, 20,4:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 260 RPM speed and 2 maximum torque. Pololu 3251

Motor with 25 mm diameter and 52 mm length, 34:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 150 RPM speed and 3 maximum torque. Pololu 3252

Motor with 25 mm diameter and 52 mm length, 47:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 110 RPM speed and 4,3 maximum torque. Pololu 3253

Motor with 25 mm diameter and 54 mm length, 75:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 71 RPM speed and 6 maximum torque. Pololu 3254

Motor with 25 mm diameter and 54 mm length, 99:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 55 RPM speed and 8 maximum torque. Pololu 3255

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