1. High quality and reasonable price. 2. Smoothing running, unique design,scientific structure design. 3. Low noise design, good protection to the floors. 4. Anti-friction, good impact resistance, high load bearing. 5. High quality material to ensure the caster capability. 6. High quality materials purchased with strictly quality check. 7. Each product checked strictly before packing. If you are interested in any of our products,please contact us now!