This 8" x 3" Solid Cast Polyurethane Elastomer Swivel Caster is made of liquid cast polyurethane. They are easy to push (designed for medium loads) with easy start-up, are capable of withstanding shock loads and abusive conditions. They are durable and resist abrasions, cracking and chipping, and are floor protective and non marking. Ideal uses for this wheel are tow lines, freezers, and other continuous use applications.
For more info, check out Caster Wheel Types.