【Aluminum Core Caster Wheels】This caster uses an aluminum wheel hub. The special design makes the caster lighter, has a stronger load-bearing capacity and is rust-proof and corrosion-resistant. 【Heavy Duty Casters】:Designed with strength and sturdiness in mind, these casters have a long lifespan and can handle heavy equipment and loads with ease. Each caster holds up to a maximum of 1000 lbs. or 4000 lbs when purchasing a set of 4 casters. 【Crown Thickened Polyurethane Tread】:The unique polyurethane wheel tread can reduce the force needed for movement and reduce the vibrations during rolling, which provides a smooth and quiet maneuver performance. Because of the special wheel tread, this wheel can deflect debris to help keep the wheel clean and decrease the maintenance cost. 【Ergonomic Casters】:These bright orange wheels stand out, crowned tread with roller bearing make a very ergonomic and quiet ride putting less stress on the user and equipment.This wheel is the perfect choice for applications where superior ergonomic performance is critical. 【Industrial Grade Applications】:These heavy duty aluminum casters are perfect for a variety of industrial uses. This caster is widely recognized in manufacturing plants and automotive factories. It is also widely used in workbenches, trailers, workshops, tool boxes, pallet racks, AGV cart handling, manufacturing stands, rolling box storage, heavy machine shops. Industrial Caster