The Revolution Design Ultra Bearings (12x18x4mm, 4pcs) are high-quality ball bearings that feature both a metal and a rubber seal. This unique combination ensures excellent low-friction performance while providing outstanding durability against dirt. They are available in many sizes and offer excellent quality at a fair price.
- High-quality ball bearings with metal and plastic seal
- Excellent low-friction performance and outstanding durability against dirt
- Inner diameter: 12mm
- Outer diameter: 18mm
- Width: 4mm
- Available in many sizes
- Excellent quality at a fair price