1)wheel:Aluminum core caster 2) Diameter: 50-75 3)Good cost performance: anti-friction, good impact resistance, high loading Specificaton: PP, PVC, POM, PU caster with brake or lockingThe features of our casters: 1. high quality and reasonable price. 2.Smoothing running, unique design 3.Low noise design, good protection to the floors 4.anti-friction, good impact resistance, high load bearing. 5. ...