Nylon Spacer: 8mm Length, 4mm OD, 2.7mm ID (50-Pack)

Nylon Spacer: 10mm Length, 4mm OD, 2.7mm ID (25-Pack)

Nylon Spacer: 12mm Length, 4mm OD, 2.7mm ID (25-Pack)

Nylon Spacer: 15mm Length, 4mm OD, 2.7mm ID (25-Pack)

Nylon Spacer: 20mm Length, 4mm OD, 2.7mm ID (10-Pack)

Nylon Spacer: 25mm Length, 4mm OD, 2.7mm ID (10-Pack)

Motor with 25 mm diameter and 48 mm length, 4,4:1 metal gear, 6 V  operating voltage, 0,05 A to 2,4 A power consumption, 1300 RPM speed and 0,6 maximum torque. Pololu 1581

Motor with 25 mm diameter and 48 mm length, 4,4:1 metal gear, 6 V  operating voltage, 0,275 A to 6,5 A power consumption, 2150 RPM speed and 1,5 maximum torque. Pololu 1570

Motor with 25 mm diameter and 48 mm length, 9,7:1 metal gear, 6 V  operating voltage, 0,55 A to 6,5 A power consumption, 990 RPM speed and 2,8 maximum torque. Pololu 1571

Motor with 25 mm diameter and 48 mm length, 9,7:1 metal gear, 6 V  operating voltage, 0,25 A to 2,4 A power consumption, 590 RPM speed and 1,2 maximum torque. Pololu 1582

Motor with 25 mm diameter and 50 mm length, 20,4:1 metal gear, 6 V operating voltage, 0,55 A to 6,5 A power consumption, 460 RPM speed and 5,5 maximum torque. Pololu 1572

Motor with 25 mm diameter and 50 mm length, 20,4:1 metal gear, 6 V operating voltage, 0,25 A to 2,4 A power consumption, 290 RPM speed and 2,4 maximum torque. Pololu 1583