CWfutureparts casters come with solid blue polyurethane wheels, ideal for clean room environments that are often exposed to large amounts of water. Solid polyurethane wheels withstand temperatures from -40° F to +180° F. If you have wash down applications, humidity, water, chemicals, steam cleaning or any application involving moisture, these casters are for you. : Heavy Duty Casters Diameter: 6", Width: 2", Top Plate: 4x 4-1/2, Overall Height: 7-1/2. These industrial casters are engineered, Heavy Duty Caster Set of 4 to support loads up to 3600 lbs, making them ideal for outdoor use and transporting heavy equipment and objects while maintaining stability.: Solid polyurethane wheels eliminate the possibility of tread delamination typically found on wheels with metal or plastic center hubs, making them widely used in bakery, hospitals, animal laboratories, pharmaceutical laboratories, and any operation requiring clean sanitation and standard venues. The caster top bracket is made of bright galvanized steel, which can withstand strong vertical impact forces. Precision ball bearings are quieter, more load-bearing and have a longer service life than other conventional bearings. This ensures that the casters run smoothly and quietly for a long time and are not easily damaged. :Heavy duty casters come with friendly customer service.