Donut Polyurethane on Aluminum

Uniquely formulated polyurethane compounds are chemically, and mechanically bonded to a precision aluminum core, preventing tread seperation and assuring reliable mobility.
Combination of Rounded Poly tread and sealed precision ball bearings minimizes surface friction, enables wheel to turn easily and requires less effort to startup and maintain a rolling load.
Poly wheel offers a semi-cushioned ride, is non-marking and is capable of rolling over small debris (metal shavings, door, and floor joints, etc.)
Great for both manual or a power assisted applications.
Durometer: 85 Shore A (+/-5).
Temperature range: -40? F to 180? F.