Polyurethane-Heavy Duty High CapacityNon-MarkingEasy Rolling
Polyurethane on AluminumEasy RollingNon-MarkingLighter than Cast Iron
Polyurethane on Cast IronMold on Poly TreadNon-MarkingAlternate Red on Silver Color
Rubber on AluminumMold on Rubber TreadLightweight OptionRoller Bearing
Semi Steel/Cast IronHigh CapacityDurableRoller Bearing
Lightweight Thermoplastic WheelsBall BearingsNon MarkingSmooth Rolling