Upgrade your industrial equipment with these 6 in. heavy - duty swivel casters. A set of 4 casters offers a combined load capacity of 5000 lbs., with each caster capable of holding up to 1250 lbs. The maintenance - free design features a dual - bearing system, eliminating the need for lubrication. The polyurethane wheel tread, chemically bonded to the aluminum core, ensures durability and rust resistance. With a high strength - to - weight ratio, these casters are not only sturdy but also lightweight. Their double ball raceways reduce friction and allow for high - speed movement. The abrasion, oil, and chemical - resistant wheels make them suitable for a wide range of settings, including research laboratories, hospitals, bakeries, and industrial manufacturing facilities. Simply attach them to your equipment for smooth and reliable movement, enhancing efficiency and convenience in your work environment. Color: Greens.